{"title":"AR-15 Bolt Carrier Groups — M16 BCGs for FRT Builds","description":null,"products":[{"product_id":"trigger-supply-m16-full-auto-cut-bcg-usa-made","title":"Trigger Supply M16 Full Auto Cut BCG – 100% USA Made | AR-15 Bolt Carrier Group","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003cmeta name=\"description\" content=\"Trigger Supply M16 full auto cut bolt carrier group. 100% USA made. Colt-spec carrier, mil-spec internals. Complete BCG for AR-15. In stock. $149.99.\"\u003e \u003clink rel=\"canonical\" href=\"https:\/\/www.artakedowntool.com\/products\/trigger-supply-m16-full-auto-cut-bcg-usa-made\"\u003e \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Trigger Supply M16 Full Auto Cut BCG – 100% USA Made | AR-15 Bolt Carrier Group\",\n    \"description\": \"Trigger Supply M16 full auto cut bolt carrier group. 100% USA made. Colt-spec carrier with mil-spec internals. Complete BCG for AR-15 and M16 mil-spec platforms. In stock.\",\n    \"image\": \"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/M16-bcg-bolt-carrier-group.jpg?v=1777163491\",\n    \"brand\": { \"@type\": \"Brand\", \"name\": \"Trigger Supply\" },\n    \"manufacturer\": {\n      \"@type\": \"Organization\",\n      \"name\": \"Trigger Supply\",\n      \"address\": { \"@type\": \"PostalAddress\", \"addressCountry\": \"US\" }\n    },\n    \"sku\": \"TS-BCG-M16-FA-USA\",\n    \"mpn\": \"TS-BCG-M16-FA-USA\",\n    \"material\": \"Steel\",\n    \"color\": \"Black\",\n    \"countryOfOrigin\": \"US\",\n    \"category\": \"Firearm Parts \u003e AR-15 \u003e Bolt Carrier Groups\",\n    \"offers\": {\n      \"@type\": \"Offer\",\n      \"url\": \"https:\/\/www.artakedowntool.com\/products\/trigger-supply-m16-full-auto-cut-bcg-usa-made\",\n      \"priceCurrency\": \"USD\",\n      \"price\": \"149.99\",\n      \"priceValidUntil\": \"2026-12-31\",\n      \"availability\": \"https:\/\/schema.org\/InStock\",\n      \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n      \"shippingDetails\": {\n        \"@type\": \"OfferShippingDetails\",\n        \"shippingRate\": {\n          \"@type\": \"MonetaryAmount\",\n          \"value\": \"0\",\n          \"currency\": \"USD\"\n        },\n        \"shippingDestination\": {\n          \"@type\": \"DefinedRegion\",\n          \"addressCountry\": \"US\"\n        },\n        \"deliveryTime\": {\n          \"@type\": \"ShippingDeliveryTime\",\n          \"handlingTime\": {\n            \"@type\": \"QuantitativeValue\",\n            \"minValue\": 0,\n            \"maxValue\": 1,\n            \"unitCode\": \"DAY\"\n          },\n          \"transitTime\": {\n            \"@type\": \"QuantitativeValue\",\n            \"minValue\": 2,\n            \"maxValue\": 5,\n            \"unitCode\": \"DAY\"\n          }\n        }\n      },\n      \"hasMerchantReturnPolicy\": {\n        \"@type\": \"MerchantReturnPolicy\",\n        \"applicableCountry\": \"US\",\n        \"returnPolicyCategory\": \"https:\/\/schema.org\/MerchantReturnFiniteReturnWindow\",\n        \"merchantReturnDays\": 30,\n        \"returnMethod\": \"https:\/\/schema.org\/ReturnByMail\",\n        \"returnFees\": \"https:\/\/schema.org\/FreeReturn\"\n      },\n      \"seller\": {\n        \"@type\": \"Organization\",\n        \"name\": \"The Takedown Tools\",\n        \"url\": \"https:\/\/www.artakedowntool.com\"\n      }\n    },\n    \"additionalProperty\": [\n      { \"@type\": \"PropertyValue\", \"name\": \"Cut\",              \"value\": \"M16 Full Auto Cut\" },\n      { \"@type\": \"PropertyValue\", \"name\": \"Carrier Spec\",     \"value\": \"Colt-Spec\" },\n      { \"@type\": \"PropertyValue\", \"name\": \"Platform\",         \"value\": \"AR-15 \/ M16 Mil-Spec\" },\n      { \"@type\": \"PropertyValue\", \"name\": \"Country of Origin\",\"value\": \"United States\" },\n      { \"@type\": \"PropertyValue\", \"name\": \"Kit Contents\",     \"value\": \"Complete BCG — carrier, bolt, cam pin, firing pin, retaining pin\" },\n      { \"@type\": \"PropertyValue\", \"name\": \"Legal Status\",     \"value\": \"Legal all 50 states in semi-auto builds\" }\n    ]\n  }\n  \u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What is an M16 full auto cut BCG?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"An M16 full auto cut BCG has an additional material relief cut on the underside of the carrier compared to a standard AR-15 carrier. In a semi-auto lower it functions identically to a standard BCG. The M16 carrier is heavier, which provides more reliable cycling, smoother recoil impulse, and better performance in suppressed setups.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Is an M16 BCG legal in a semi-auto AR-15?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. An M16 full auto cut BCG is legal to own and use in a semi-auto AR-15 in all 50 states. The BCG itself is not a regulated component. Installing it in a semi-auto lower does not convert the firearm to fire automatically — full auto fire requires additional registered components. The M16 BCG simply functions as a heavier, more robust carrier in your semi-auto build.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What is the difference between an M16 BCG and a standard AR-15 BCG?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"The primary difference is the full auto relief cut on the underside of the M16 carrier and slightly more mass. The added weight produces a smoother, slower recoil impulse which improves reliability, especially with suppressors or adverse conditions. In a semi-auto lower, the M16 BCG fires and resets identically to a standard BCG.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What does Colt-spec mean for a BCG?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Colt-spec refers to the dimensional and material specifications set by Colt, which established the original mil-spec standard for AR-15 and M16 components. A Colt-spec BCG meets or exceeds the original military tolerances for carrier geometry, bolt material, and gas key staking.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Does this BCG work with the Hoffman Tactical Super Safety?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. This M16 full auto cut BCG is fully compatible with the Hoffman Tactical Super Safety. The Super Safety's active reset cam interfaces with the carrier as it cycles — the M16 cut does not affect this interface. The added carrier mass can actually improve Super Safety reliability by providing a more consistent cycling impulse.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Is this BCG 100% USA made?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. This bolt carrier group is 100% USA manufactured — carrier, bolt, cam pin, firing pin, and retaining pin are all domestically produced to mil-spec tolerances.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Does this BCG come with a bolt?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. This is a complete bolt carrier group — it includes the carrier, bolt, cam pin, firing pin, and firing pin retaining pin, fully assembled and ready to drop in.\"\n        }\n      }\n    ]\n  }\n  \u003c\/script\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n    @import url('https:\/\/fonts.googleapis.com\/css2?family=Bebas+Neue\u0026family=DM+Sans:wght@300;400;500;600\u0026display=swap');\n\n    :root {\n      --bronze: #b07a28;\n      --surface: #f5f5f5;\n      --border: #dddddd;\n    }\n\n    #pw, #pw * { color: inherit; }\n    #pw p, #pw li, #pw td, #pw div, #pw span { color: #111111 !important; }\n    #pw h1, #pw h2, #pw h3, #pw h4 { color: #111111 !important; }\n    #pw strong { color: #111111 !important; }\n    #pw .pw-badge { background: #b07a28 !important; color: #000 !important; }\n    #pw .pw-h1 { color: #111111 !important; }\n    #pw .pw-h1 span { color: #b07a28 !important; }\n    #pw .pw-price { color: #b07a28 !important; }\n    #pw .pw-stock { color: #4caf7d !important; }\n    #pw .pw-legal { color: #444444 !important; 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font-size: 12.5px; color: #888; line-height: 1.6; }\n    @keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }\n    .pw-animate  { animation: fadeUp .5s ease both; }\n    .pw-animate-2 { animation: fadeUp .5s .1s ease both; }\n    .pw-animate-3 { animation: fadeUp .5s .2s ease both; }\n  \u003c\/style\u003e\n\u003cdiv id=\"pw\"\u003e\n\u003cdiv class=\"pw-animate\"\u003e\n\u003cdiv class=\"pw-badge\"\u003eTrigger Supply · 100% USA Made · M16 Full Auto Cut · Colt Spec\u003c\/div\u003e\n\u003ch1 class=\"pw-h1\"\u003eTrigger Supply M16 Full Auto Cut \u003cspan\u003eBolt Carrier Group\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pw-price-row pw-animate-2\"\u003e\n\u003cdiv class=\"pw-price\"\u003e$149.99\u003c\/div\u003e\n\u003cdiv class=\"pw-stock\"\u003e● In Stock — Ships Fast\u003c\/div\u003e\n\u003cdiv class=\"pw-legal\"\u003eLegal All 50 States\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pw-trust pw-animate-3\"\u003e\n\u003cdiv class=\"pw-trust-item\"\u003e100% USA Made\u003c\/div\u003e\n\u003cdiv class=\"pw-trust-item\"\u003eM16 Full Auto Cut\u003c\/div\u003e\n\u003cdiv class=\"pw-trust-item\"\u003eColt-Spec Carrier\u003c\/div\u003e\n\u003cdiv class=\"pw-trust-item\"\u003eComplete BCG\u003c\/div\u003e\n\u003cdiv class=\"pw-trust-item\"\u003eMil-Spec Internals\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pw-body\"\u003e```\n\u003ch2 class=\"pw-h2\"\u003eWhat You're Getting\u003c\/h2\u003e\n\u003cp\u003eThis is a \u003cstrong\u003e100% USA made M16 full auto cut bolt carrier group\u003c\/strong\u003e — the same Colt-spec carrier used in our Super Safety combos, now available as a standalone unit. Everything from the carrier body to the bolt is domestically manufactured to mil-spec tolerances. This is a complete, drop-in BCG ready for any mil-spec AR-15 upper.\u003c\/p\u003e\n\u003cp\u003eThe M16 full auto cut carrier is heavier than a standard AR-15 carrier. That added mass produces a slower, smoother recoil impulse — improving reliability across a wider range of ammunition, suppressed setups, and adverse conditions. It is fully legal in all 50 states and functions identically to a standard BCG in any semi-auto lower.\u003c\/p\u003e\n\u003ch2 class=\"pw-h2\"\u003eM16 Cut vs Standard AR-15 BCG\u003c\/h2\u003e\n\u003cdiv class=\"pw-positions\"\u003e\n\u003cdiv class=\"pw-pos\"\u003e\n\u003cdiv class=\"pw-pos-label\"\u003eM16 Full Auto Cut\u003c\/div\u003e\n\u003cp\u003eFull relief cut on the underside of the carrier. More mass. Smoother, slower recoil impulse. Better suppressor compatibility. Compatible with all mil-spec AR-15 uppers. Legal all 50 states in semi-auto builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pw-pos\"\u003e\n\u003cdiv class=\"pw-pos-label\"\u003eStandard AR-15 BCG\u003c\/div\u003e\n\u003cp\u003eLighter carrier, no relief cut. Functions identically in semi-auto. Less mass means a sharper, faster recoil cycle — less forgiving in adverse conditions or suppressed setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"pw-h2\"\u003eWhy M16 Full Auto Cut\u003c\/h2\u003e\n\u003cul class=\"pw-features\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore reliable cycling\u003c\/strong\u003e — heavier carrier provides greater momentum through full travel, clearing dirty or underpowered ammunition that stops lighter carriers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmoother recoil impulse\u003c\/strong\u003e — added mass slows the carrier slightly, distributing recoil over a longer window for a flatter, more controllable feel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuppressor optimized\u003c\/strong\u003e — M16 carriers handle increased backpressure from suppressed fire more reliably than standard carriers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuper Safety compatible\u003c\/strong\u003e — the M16 carrier's consistent cycling impulse pairs ideally with the Hoffman Tactical Super Safety's active reset cam\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-in installation\u003c\/strong\u003e — fits all mil-spec AR-15 uppers with no modification required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"pw-h2\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/M16-bcg-bolt-carrier-group.jpg?v=1777163491\" alt=\"\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"pw-features\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarrier\u003c\/strong\u003e — M16 full auto cut, Colt-spec geometry, 100% USA made\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt\u003c\/strong\u003e — mil-spec, USA made, ready to run\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam pin\u003c\/strong\u003e — mil-spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiring pin\u003c\/strong\u003e — mil-spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiring pin retaining pin\u003c\/strong\u003e — mil-spec\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFully assembled. Drop it in and go.\u003c\/p\u003e\n\u003ch2 class=\"pw-h2\"\u003eSpecs\u003c\/h2\u003e\n\u003ctable class=\"pw-specs\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut\u003c\/td\u003e\n\u003ctd\u003eM16 Full Auto Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarrier Spec\u003c\/td\u003e\n\u003ctd\u003eColt-Spec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eAR-15 \/ M16 Mil-Spec Upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003e100% USA Made\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Contents\u003c\/td\u003e\n\u003ctd\u003eComplete BCG — carrier, bolt, cam pin, firing pin, retaining pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLegal Status\u003c\/td\u003e\n\u003ctd\u003eLegal all 50 states in semi-auto builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDrop-in, no modification required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"pw-h2\"\u003ePairs With\u003c\/h2\u003e\n\u003cp\u003eThis BCG is the same unit included in our \u003cstrong\u003eSuper Safety combo bundles\u003c\/strong\u003e. If you already run a Hoffman Tactical Super Safety or are building a new Super Safety setup, this is the recommended carrier — the M16 cut's consistent cycling impulse gives the Super Safety's active reset cam the most reliable interface possible.\u003c\/p\u003e\n\u003ch2 class=\"pw-h2\"\u003eWhy Buy From Us\u003c\/h2\u003e\n\u003cul class=\"pw-features\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% USA made\u003c\/strong\u003e — not imported, not rebranded offshore stock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn stock, ships fast\u003c\/strong\u003e — no preorder, no backorder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal customer support\u003c\/strong\u003e — we answer our own phones and email\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame BCG as our combo builds\u003c\/strong\u003e — proven in Super Safety bundles, now available standalone\u003c\/li\u003e\n\u003c\/ul\u003e\n```\u003c\/div\u003e\n\u003ch2 class=\"pw-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"pw-faq\"\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eWhat is an M16 full auto cut BCG?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eAn M16 full auto cut BCG has an additional material relief cut on the underside of the carrier compared to a standard AR-15 carrier. In a semi-auto lower it functions identically to a standard BCG. The M16 carrier is heavier, which provides more reliable cycling, smoother recoil impulse, and better performance in suppressed setups.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eIs an M16 BCG legal in a semi-auto AR-15?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eYes. An M16 full auto cut BCG is legal to own and use in a semi-auto AR-15 in all 50 states. The BCG itself is not a regulated component. Installing it in a semi-auto lower does not convert the firearm to fire automatically — full auto fire requires additional registered components. The M16 BCG simply functions as a heavier, more robust carrier in your semi-auto build.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eWhat is the difference between an M16 BCG and a standard AR-15 BCG?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eThe primary difference is the full auto relief cut on the underside of the M16 carrier and slightly more mass. The added weight produces a smoother, slower recoil impulse which improves reliability, especially with suppressors or adverse conditions. In a semi-auto lower, the M16 BCG fires and resets identically to a standard BCG.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eWhat does Colt-spec mean for a BCG?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eColt-spec refers to the dimensional and material specifications set by Colt, which established the original mil-spec standard for AR-15 and M16 components. A Colt-spec BCG meets or exceeds the original military tolerances for carrier geometry, bolt material, and gas key staking.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eDoes this BCG work with the Hoffman Tactical Super Safety?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eYes. This M16 full auto cut BCG is fully compatible with the Hoffman Tactical Super Safety. The Super Safety's active reset cam interfaces with the carrier as it cycles — the M16 cut does not affect this interface. The added carrier mass can actually improve Super Safety reliability by providing a more consistent cycling impulse.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eIs this BCG 100% USA made?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eYes. This bolt carrier group is 100% USA manufactured — carrier, bolt, cam pin, firing pin, and retaining pin are all domestically produced to mil-spec tolerances.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pw-faq-item\"\u003e\n\u003csummary\u003eDoes this BCG come with a bolt?\u003c\/summary\u003e\n\u003cdiv class=\"pw-faq-answer\"\u003eYes. This is a complete bolt carrier group — it includes the carrier, bolt, cam pin, firing pin, and firing pin retaining pin, fully assembled and ready to drop in.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"pw-h2\"\u003eRelated Products\u003c\/h2\u003e\n\u003cdiv class=\"pw-links\"\u003e\n\u003ca href=\"\/products\/hoffman-tactical-super-safety-s7-tool-steel-flat-trigger\" class=\"pw-link-card\"\u003eSuper Safety – S7 Flat Trigger\u003cspan\u003e3-position active reset · $119.99\u003c\/span\u003e\u003c\/a\u003e \u003ca href=\"\/products\/hoffman-tactical-super-safety-s7-tool-steel-curved-trigger\" class=\"pw-link-card\"\u003eSuper Safety – S7 Curved Trigger\u003cspan\u003e3-position active reset · $99.99\u003c\/span\u003e\u003c\/a\u003e \u003ca href=\"\/products\/hoffman-tactical-super-safety-ar-15-100-usa-made\" class=\"pw-link-card\"\u003eSuper Safety – Standard\u003cspan\u003eEntry configuration · $84.99\u003c\/span\u003e\u003c\/a\u003e \u003ca href=\"\/pages\/frt-vs-super-safety-differences\" class=\"pw-link-card\"\u003eFRT vs Super Safety — Full Comparison\u003cspan\u003eWhich is right for your build?\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pw-keyword-box\"\u003e\n\u003cp class=\"pw-disclaimer\"\u003eIt is the buyer's responsibility to understand and comply with all applicable local, state, and federal laws regarding firearm parts and accessories. This M16 full auto cut BCG is legal for use in semi-automatic AR-15 builds in all 50 states. It does not convert a firearm to fire automatically. Install by a qualified individual familiar with AR-15 platforms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Trigger Supply","offers":[{"title":"Default Title","offer_id":48137145385205,"sku":"BCG","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/M16-bcg-bolt-carrier-group-sale.jpg?v=1780668907"},{"product_id":"mpi-nickel-boron-ar15-bcg-m16-cut","title":"MPI Nickel Boron AR-15 BCG — M16 Cut | .223\/5.56","description":"\u003c!-- ═══════════════════════════════════════════════════════════\n     SEO — Shopify \u003e Products \u003e SEO section\n═══════════════════════════════════════════════════════════ --\u003e\n\n\u003c!-- PAGE TITLE:\nMPI Nickel Boron AR-15 BCG — M16 Cut | Carpenter 158 Bolt | USA Made | ARTakedownTool.com\n--\u003e\n\n\u003c!-- META DESCRIPTION:\nMPI Nickel Boron AR-15 Bolt Carrier Group — M16 cut, Carpenter 158 steel bolt, 9310 steel carrier, magnetic particle inspected. $159.99. 100% USA made. In stock at ARTakedownTool.com.\n--\u003e\n\n\u003c!-- URL HANDLE: mpi-nickel-boron-ar15-bcg-m16-cut --\u003e\n\n\n\u003c!-- ═══════════════════════════════════════════════════════════\n     SCHEMA — Paste into Shopify theme.liquid before \u003c\/head\u003e\n     OR Online Store \u003e Preferences \u003e Additional Scripts\n═══════════════════════════════════════════════════════════ --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"MPI Nickel Boron AR-15 Bolt Carrier Group — M16 Cut\",\n  \"description\": \"Nickel boron coated AR-15 Bolt Carrier Group with M16 cut. Features a Carpenter 158 steel bolt, 9310 steel carrier, 4140 steel extractor and ejector with nitride coating, magnetic particle inspection, and MIL-SPEC components throughout. 100% USA made.\",\n  \"image\": [\n    \"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/Nickel-AR15-BCG-M16-cut.png?v=1779121120\"\n  ],\n  \"url\": \"https:\/\/www.artakedowntool.com\/products\/mpi-nickel-boron-ar15-bcg-m16-cut\",\n  \"sku\": \"MPI-NiB-BCG-M16-556\",\n  \"brand\": { \"@type\": \"Brand\", \"name\": \"MPI\" },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"159.99\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"url\": \"https:\/\/www.artakedowntool.com\/products\/mpi-nickel-boron-ar15-bcg-m16-cut\",\n    \"seller\": { \"@type\": \"Organization\", \"name\": \"The Takedown Tools\" }\n  }\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this BCG compatible with the Partisan Disruptor FRT?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The MPI Nickel Boron BCG has an M16 cut, which is required for reliable operation with the Partisan Disruptor FRT. The M16 profile carrier tail provides the geometry the Disruptor's reset lobe needs to function correctly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What calibers does this BCG support?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This BCG is chambered for .223 Remington and 5.56 NATO and is compatible with all mil-spec AR-15 platforms in those calibers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the advantage of nickel boron over standard phosphate finish?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nickel boron provides a harder, slicker surface than phosphate. It reduces friction between the bolt and carrier, runs cleaner with less fouling buildup, and is significantly easier to clean. It also offers excellent corrosion resistance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is Carpenter 158 steel and why does it matter for the bolt?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carpenter 158 is the MIL-SPEC steel specification for AR-15 bolts. It provides the correct balance of hardness, toughness, and fatigue resistance under the high-stress cycling of semi-automatic fire. It is the same standard used by military contractors.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does magnetic particle inspected (MPI) mean?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Magnetic particle inspection is a non-destructive testing process that detects surface and near-surface cracks in ferromagnetic materials. Every MPI-tested bolt is individually inspected to confirm there are no stress fractures or defects before it ships. It is the industry gold standard for bolt quality verification.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\n\u003c!-- ═══════════════════════════════════════════════════════════\n     PRODUCT DESCRIPTION — Paste into Shopify product description\n     using the \u003c \u003e HTML editor toggle\n═══════════════════════════════════════════════════════════ --\u003e\n\u003cstyle\u003e\n  .nbcg { font-family: inherit; color: #111; line-height: 1.65; }\n  .nbcg h2 { font-size: 18px; font-weight: 700; margin: 28px 0 10px; padding-top: 28px; border-top: 1px solid #e8e8e8; letter-spacing: .3px; }\n  .nbcg h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }\n  .nbcg h3 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; color: #cd7f2e; margin: 20px 0 8px; }\n  .nbcg p { font-size: 14px; color: #444; margin-bottom: 12px; line-height: 1.65; }\n  .nbcg ul { padding-left: 0; list-style: none; margin: 0 0 14px; }\n  .nbcg ul li { font-size: 14px; color: #444; padding: 7px 0 7px 20px; border-bottom: 1px solid #f0f0f0; position: relative; }\n  .nbcg ul li::before { content: '▸'; color: #cd7f2e; position: absolute; left: 0; }\n  .nbcg .spec-table { width: 100%; border-collapse: collapse; margin: 0 0 16px; font-size: 14px; }\n  .nbcg .spec-table th { background: #f8f8f8; font-weight: 600; text-align: left; padding: 8px 12px; border: 1px solid #e8e8e8; color: #111; width: 40%; font-size: 13px; }\n  .nbcg .spec-table td { padding: 8px 12px; border: 1px solid #e8e8e8; color: #444; }\n  .nbcg .spec-table tr:nth-child(even) td { background: #fafafa; }\n  .nbcg .note { background: #fff8f0; border-left: 3px solid #cd7f2e; padding: 10px 14px; margin: 14px 0; font-size: 13px; color: #7a5520; border-radius: 0 3px 3px 0; line-height: 1.6; }\n  .nbcg .frt-callout { background: #f0faef; border-left: 3px solid #1a7a1a; padding: 10px 14px; margin: 14px 0; font-size: 13px; color: #1a5a1a; border-radius: 0 3px 3px 0; line-height: 1.6; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"nbcg\"\u003e\n\n  \u003ch3\u003eOverview\u003c\/h3\u003e\n  \u003cp\u003eA fully MIL-SPEC Nickel Boron coated AR-15 Bolt Carrier Group built to run hard, clean easy, and last. M16 cut carrier, Carpenter 158 steel bolt, magnetic particle inspected — everything correct, nothing cut short. 100% USA made.\u003c\/p\u003e\n\n  \u003cdiv class=\"frt-callout\"\u003e\n    \u003cstrong\u003eFRT Compatible:\u003c\/strong\u003e M16 cut carrier is required for reliable function with the \u003ca href=\"https:\/\/www.artakedowntool.com\/products\/patented-forced-reset-drop-in-cassette-trigger-ar-15-platform-usa-made\" style=\"color:#1a7a1a;\"\u003ePartisan Disruptor FRT\u003c\/a\u003e. This BCG meets that requirement. If you're building an FRT platform, \u003ca href=\"https:\/\/www.artakedowntool.com\/products\/partisan-disruptor-hfrt-bundle\" style=\"color:#1a7a1a;\"\u003esee our Disruptor + HFRT Buffer Bundle\u003c\/a\u003e — or add this BCG to complete the setup.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable class=\"spec-table\"\u003e\n    \u003ctr\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003ctd\u003e.223 Remington \/ 5.56 NATO\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNickel Boron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCarrier Cut\u003c\/th\u003e\n\u003ctd\u003eM16 Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCarrier Material\u003c\/th\u003e\n\u003ctd\u003e9310 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBolt Material\u003c\/th\u003e\n\u003ctd\u003eCarpenter 158 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eExtractor \u0026amp; Ejector\u003c\/th\u003e\n\u003ctd\u003e4140 Steel — Nitride Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCam Pin\u003c\/th\u003e\n\u003ctd\u003e4140 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFiring Pin\u003c\/th\u003e\n\u003ctd\u003e8740 Steel — Hard Chrome Finish\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGas Rings\u003c\/th\u003e\n\u003ctd\u003eMIL-SPEC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eO-Ring\u003c\/th\u003e\n\u003ctd\u003eMIL-SPEC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInspection\u003c\/th\u003e\n\u003ctd\u003eMagnetic Particle Inspected (MPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003e100% USA Made\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003ctd\u003e$159.99\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eFeatures\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNickel boron finish — harder, slicker, and easier to clean than phosphate or standard nitride\u003c\/li\u003e\n    \u003cli\u003eM16 cut carrier — required for FRT builds; compatible with all standard AR-15 platforms\u003c\/li\u003e\n    \u003cli\u003eCarpenter 158 steel bolt — MIL-SPEC standard, same spec used by military contractors\u003c\/li\u003e\n    \u003cli\u003e9310 steel carrier — high-strength alloy with excellent fatigue resistance\u003c\/li\u003e\n    \u003cli\u003e4140 steel extractor \u0026amp; ejector with nitride coating — added hardness and corrosion resistance\u003c\/li\u003e\n    \u003cli\u003e4140 steel cam pin — matched hardness to carrier for long service life\u003c\/li\u003e\n    \u003cli\u003e8740 steel firing pin with hard chrome finish — corrosion resistant, dimensionally stable\u003c\/li\u003e\n    \u003cli\u003eMIL-SPEC O-ring and gas rings — correct sealing and gas management from day one\u003c\/li\u003e\n    \u003cli\u003eMagnetic particle inspected — every bolt individually tested for surface and subsurface defects\u003c\/li\u003e\n    \u003cli\u003e100% USA made\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eWhy Nickel Boron?\u003c\/h2\u003e\n  \u003cp\u003eNickel boron is harder and has a lower coefficient of friction than phosphate. That means less heat buildup, less fouling adhesion, and a BCG that wipes clean in seconds rather than minutes. It runs reliably with or without lubrication — important for high-rate-of-fire applications like FRT builds where the BCG cycles under greater stress and frequency than standard semi-auto use.\u003c\/p\u003e\n  \u003cp\u003eCombined with an M16 profile carrier and fully MIL-SPEC internals, this BCG is one of the most capable drop-in upgrades available for any mil-spec AR-15 platform.\u003c\/p\u003e\n\n  \u003ch2\u003eFRT Compatibility\u003c\/h2\u003e\n  \u003cdiv class=\"note\"\u003eThe Partisan Disruptor FRT requires an M16-profile BCG for reliable reset function. The M16 carrier tail provides the extended geometry that engages the Disruptor's reset lobe during the cycling stroke. A standard semi-auto carrier will not provide consistent reset. This BCG meets that requirement and is a direct recommended pairing for any Disruptor build.\u003c\/div\u003e\n\n  \u003ch2\u003eRelated Products \u0026amp; Resources\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/patented-forced-reset-drop-in-cassette-trigger-ar-15-platform-usa-made\" style=\"color:#cd7f2e;\"\u003ePartisan Disruptor FRT — AR-15 Forced Reset Trigger ($300)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/odin-works-hfrt-buffer-system\" style=\"color:#cd7f2e;\"\u003eOdin Works HFRT Buffer System — Purpose-Built for FRTs ($80)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/partisan-disruptor-hfrt-bundle\" style=\"color:#cd7f2e;\"\u003ePartisan Disruptor FRT + Odin Works HFRT Bundle — Save $30 ($350)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/hoffman-super-safety-s-atrius-selector-ak-frt-22-lr-frt-arc-frt\" style=\"color:#cd7f2e;\"\u003eHoffman Tactical Super Safety\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/as-designs-arc-trigger\" style=\"color:#cd7f2e;\"\u003eAS Designs ARC-Fire V2\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eFRT Resources\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/best-frt-triggers-for-ar-15\" style=\"color:#cd7f2e;\"\u003eBest FRT Triggers for AR-15 — 2026 Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/blogs\/blogs\/forced-reset-trigger-ar15-install-guide-2026\" style=\"color:#cd7f2e;\"\u003eFRT Install Guide — Step by Step\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/are-frt-triggers-legal\" style=\"color:#cd7f2e;\"\u003eAre FRT Triggers Legal?\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/frt-vs-super-safety-differences\" style=\"color:#cd7f2e;\"\u003eFRT vs Super Safety — What's the Difference?\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/partisan-disruptor-troubleshooting\" style=\"color:#cd7f2e;\"\u003ePartisan Disruptor Troubleshooting Guide\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/blogs\/blogs\" style=\"color:#cd7f2e;\"\u003eFRT Blog — Tips, Guides \u0026amp; News\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e\n","brand":"The Takedown Tools","offers":[{"title":"Default Title","offer_id":48159939133685,"sku":"Nickel","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/Nickel-AR15-BCG-M16-cut_7a27f4b6-edd3-4432-bbe2-f1e2fdf984bf.png?v=1779121466"},{"product_id":"polished-chrome-bcg","title":"Highly Polished Mirror Chrome BCG — Full Auto Bolt Carrier Group | 5.56 \/ .223 \/ 300 BLK","description":"\u003c!-- ============ BLOCK 1: SEO FIELDS ============ --\u003e\n\u003c!-- SEO TITLE (59 chars): Polished Chrome BCG — Full Auto M16 5.56 Bolt Carrier Group --\u003e\n\u003c!-- META DESCRIPTION (151 chars): Mirror-polished chrome BCG for AR-15 and M16. Full auto profile, C158 bolt, 8620 carrier, MPI and HPT tested. 5.56, .223 and 300 Blackout. Made in USA. --\u003e\n\n\u003c!-- ============ BLOCK 2: SCHEMA (JSON-LD) ============ --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Highly Polished Mirror Chrome BCG — Full Auto Bolt Carrier Group\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Trigger Supply\"\n  },\n  \"description\": \"A mirror-finish polished chrome bolt carrier group built to true mil-spec dimensions for AR-15, M4 and M16 platforms. Full auto profile carrier in 8620 tool steel with a C158 bolt, properly staked 4130 gas key, and 4140 extractor and cam pin. Magnetic particle inspected and high pressure tested. Chambered for 5.56x45mm NATO, .223 Remington and .300 AAC Blackout.\",\n  \"sku\": \"CHROME-BCG-POLISHED\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"price\": \"249.99\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\"\n  }\n}\n\u003c\/script\u003e\n\n\u003c!-- ============ BLOCK 3: DESCRIPTION HTML ============ --\u003e\n\u003cdiv id=\"pw\"\u003e\n\u003cstyle\u003e\n#pw .cbc-wrap{width:100%!important;max-width:100%!important;color:#1a1a1a!important;font-family:'DM Sans',Helvetica,Arial,sans-serif!important;line-height:1.65!important}\n#pw .cbc-h2{font-family:'Bebas Neue',Impact,sans-serif!important;font-size:28px!important;letter-spacing:1px!important;color:#0a0a0a!important;margin:28px 0 10px 0!important;border-bottom:2px solid #c8913a!important;padding-bottom:6px!important}\n#pw .cbc-h3{font-family:'Bebas Neue',Impact,sans-serif!important;font-size:21px!important;letter-spacing:.5px!important;color:#0a0a0a!important;margin:20px 0 6px 0!important}\n#pw .cbc-p{font-size:16px!important;color:#1a1a1a!important;margin:0 0 14px 0!important}\n#pw .cbc-flag{background:#fff8ec!important;border-left:4px solid #c8913a!important;padding:14px 16px!important;margin:18px 0!important;font-size:15px!important;color:#1a1a1a!important}\n#pw .cbc-list{margin:0 0 16px 20px!important;padding:0!important}\n#pw .cbc-list li{font-size:16px!important;color:#1a1a1a!important;margin-bottom:8px!important}\n#pw .cbc-table{width:100%!important;border-collapse:collapse!important;margin:14px 0 20px 0!important;font-size:15px!important}\n#pw .cbc-table th{background:#0a0a0a!important;color:#ffffff!important;text-align:left!important;padding:10px 12px!important;font-family:'Bebas Neue',Impact,sans-serif!important;letter-spacing:.5px!important;font-size:16px!important}\n#pw .cbc-table td{border-bottom:1px solid #e0e0e0!important;padding:10px 12px!important;color:#1a1a1a!important}\n#pw .cbc-table td:first-child{font-weight:700!important;color:#0a0a0a!important;width:38%!important}\n#pw .cbc-links{background:#0a0a0a!important;padding:18px 20px!important;margin:26px 0 0 0!important}\n#pw .cbc-links p{color:#ffffff!important;font-size:15px!important;margin:0 0 10px 0!important}\n#pw .cbc-links a{color:#c8913a!important;text-decoration:underline!important;font-weight:700!important}\n#pw .cbc-legal{font-size:14px!important;color:#555555!important;border-top:1px solid #e0e0e0!important;padding-top:14px!important;margin-top:22px!important}\n\u003c\/style\u003e\n\n\u003cdiv class=\"cbc-wrap\"\u003e\n\n\u003cp class=\"cbc-p\"\u003e\u003cstrong\u003eMost BCGs are built to disappear inside the receiver. This one wasn't.\u003c\/strong\u003e A true mil-spec bolt carrier group finished in highly polished mirror chrome — the kind of finish that turns a glass-top build into a centerpiece and makes an ejection port worth looking into. But the finish is the last thing that matters here, not the first.\u003c\/p\u003e\n\n\u003cp class=\"cbc-p\"\u003eUnderneath the mirror is a full auto profile carrier machined from 8620 tool steel, a C158 bolt, a properly staked 4130 gas key, and a 4140 extractor and cam pin. Every unit is magnetic particle inspected and high pressure tested. Built to true mil-spec dimensions, made in the USA, and rated for full auto duty cycles whether or not your rifle will ever see them.\u003c\/p\u003e\n\n\u003ch2 class=\"cbc-h2\"\u003eWhy Chrome Actually Matters\u003c\/h2\u003e\n\u003cp class=\"cbc-p\"\u003ePolished chrome isn't only cosmetic. The hard, slick surface reduces friction against the receiver walls, resists carbon adhesion, and wipes clean with far less effort than phosphate. Carbon that would normally bake onto a parkerized carrier tends to lift off chrome with a rag and solvent — which matters a great deal if you run suppressed, run a forced reset trigger, or run high round counts between cleanings.\u003c\/p\u003e\n  \n\u003cdiv style=\"background:#141414;border:2px solid #c8913a;padding:16px 18px;margin:18px 0;\"\u003e\n\u003cp style=\"color:#ffffff;font-family:'Bebas Neue',Impact,sans-serif;font-size:20px;letter-spacing:.5px;margin:0 0 6px 0;\"\u003eBUILD IT IN A COMBO \u0026amp; SAVE $50\u003c\/p\u003e\n\u003cp style=\"color:#d8d8d8;font-size:15px;margin:0 0 10px 0;\"\u003eGet this with a matched buffer and M16-cut BCG — everything spec'd to run together, shipped in one order.\u003c\/p\u003e\n\u003ca href=\"\/products\/build-your-own-disruptor-frt-combo\" style=\"color:#c8913a;font-weight:700;text-decoration:underline;font-size:15px;\"\u003eBuild Your Combo →\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003cul class=\"cbc-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlicker cycling.\u003c\/strong\u003e Lower friction against receiver walls than phosphate or nitride.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasier cleanup.\u003c\/strong\u003e Carbon fouling releases instead of bonding to the surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion resistant.\u003c\/strong\u003e Chrome holds up against sweat, humidity and long safe storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShow-build ready.\u003c\/strong\u003e A mirror finish that reads as intentional through a clear or skeletonized upper.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 class=\"cbc-h2\"\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"cbc-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eHighly polished mirror chrome\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAR-15 \/ M4 \/ M16 — full auto rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibers\u003c\/td\u003e\n\u003ctd\u003e5.56x45mm NATO, .223 Remington, .300 AAC Blackout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarrier profile\u003c\/td\u003e\n\u003ctd\u003eFull auto style with properly staked gas key\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarrier material\u003c\/td\u003e\n\u003ctd\u003e8620 tool steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBolt material\u003c\/td\u003e\n\u003ctd\u003eC158\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas key\u003c\/td\u003e\n\u003ctd\u003e4130 steel, properly staked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtractor \u0026amp; cam pin\u003c\/td\u003e\n\u003ctd\u003e4140 steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal weight\u003c\/td\u003e\n\u003ctd\u003e10.5 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eTrue mil-spec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTesting\u003c\/td\u003e\n\u003ctd\u003eMagnetic particle inspected (MPI) and high pressure tested (HPT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2 class=\"cbc-h2\"\u003eMPI and HPT — What They Actually Mean\u003c\/h2\u003e\n\u003cp class=\"cbc-p\"\u003eThese two acronyms get printed on a lot of listings and explained on almost none of them. \u003cstrong\u003eHigh pressure testing\u003c\/strong\u003e means each bolt is fired with an overpressure proof round well beyond normal chamber pressure to confirm it survives worst-case conditions. \u003cstrong\u003eMagnetic particle inspection\u003c\/strong\u003e then checks that same bolt for microscopic cracks invisible to the eye. A bolt that passes both has been proven, not assumed. Skipping these is where cheap BCGs save money — and where they fail, usually at the bolt lugs.\u003c\/p\u003e\n\n\u003ch2 class=\"cbc-h2\"\u003eFitment\u003c\/h2\u003e\n\u003ch3 class=\"cbc-h3\"\u003eFits\u003c\/h3\u003e\n\u003cul class=\"cbc-list\"\u003e\n\u003cli\u003eStandard AR-15, M4 and M16 pattern uppers in 5.56 NATO and .223 Remington\u003c\/li\u003e\n\u003cli\u003e.300 AAC Blackout uppers using a standard 5.56 bolt face\u003c\/li\u003e\n\u003cli\u003eMil-spec and forged receivers built to standard dimensions\u003c\/li\u003e\n\u003cli\u003eSemi-auto and full auto profile lowers — the full auto carrier profile is legal in a semi-auto rifle and adds carrier mass for smoother cycling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 class=\"cbc-h3\"\u003eDoes not fit\u003c\/h3\u003e\n\u003cul class=\"cbc-list\"\u003e\n\u003cli\u003eAR-10 \/ .308 platforms — this is an AR-15 pattern BCG\u003c\/li\u003e\n\u003cli\u003e9mm blowback uppers, which require a dedicated 9mm bolt carrier\u003c\/li\u003e\n\u003cli\u003eNon-standard or proprietary receiver dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"cbc-flag\"\u003e\n\u003cstrong\u003eRunning a forced reset trigger?\u003c\/strong\u003e Carrier quality and gas key staking matter more with an FRT than with a standard trigger, because the reset relies on consistent, repeatable carrier travel. A properly staked full auto profile carrier is the right foundation for an FRT build.\n\u003c\/div\u003e\n\n\u003cdiv class=\"cbc-links\"\u003e\n\u003cp\u003e\u003cstrong\u003eBuild it out:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/best-frt-triggers-for-ar-15\"\u003eBest FRT triggers for AR-15 — full buyer's guide\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/blogs\/how-forced-reset-triggers-work\"\u003eHow forced reset triggers actually work\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/partisan-triggers-collection\"\u003eShop The Triggered Company Disruptor FRT\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/are-frt-triggers-legal\"\u003eAre FRT triggers legal? State-by-state resource\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp class=\"cbc-legal\"\u003ePolished chrome is a functional finish with a cosmetic benefit. Normal handling, installation and use will produce light surface marks over time; this is expected wear and not a defect. Verify your build's gas system and buffer weight are correctly matched before use.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Trigger Supply","offers":[{"title":"Default Title","offer_id":48453696880885,"sku":"Chrome BCG","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/High_Polish_Chrome_5.56_AR-15_Bolt_Carrier_Group_BCG_FRT.png?v=1784604070"},{"product_id":"kak-industry-dbc-k-spec-bcg-frt-ar15","title":"KAK Industry DBC K-SPEC BCG | First BCG Built for FRT Triggers | AR-15","description":"\u003c!-- ============================================================\n     KAK INDUSTRY DBC K-SPEC BCG — $199.99\n     URL: \/products\/kak-industry-dbc-k-spec-bcg-frt-ar15\n     \n     SEO STRATEGY: Own \"FRT BCG,\" \"BCG for forced reset trigger,\"\n     \"best BCG for FRT AR-15,\" and \"KAK K-SPEC BCG.\" Secondary:\n     expand into \"AR-15 BCG upgrade,\" \"best AR-15 BCG,\" \"suppressed\n     AR-15 BCG\" — broad AR-15 parts authority with FRT angle as\n     the primary differentiator. Patent US 12,474,132 B2 cited.\n     \n     KEY CLAIMS (sourced from KAK's own product documentation):\n     - First BCG engineered specifically for FRT use\n     - Floating weight dead-blow carrier tail eliminates bolt bounce\n     - Allows standard 3oz carbine buffer instead of H2\/H3\n     - Tested: Hoffman Super Safety, AS Designs ARC-Fire, Atrius, Rare Breed FRT\n     - Patent pending → Patent US 12,474,132 B2\n============================================================ --\u003e\n\n\n\u003c!-- ============ BLOCK 1: SEO FIELDS ============ --\u003e\n\u003c!--\n  PRODUCT TITLE:\n  KAK Industry DBC K-SPEC BCG | First BCG Built for FRT Triggers | AR-15\n\n  SEO TITLE (60 chars):\n  KAK K-SPEC BCG | First FRT Bolt Carrier Group | AR-15\n  COUNT: 53 ✓\n\n  META DESCRIPTION (154 chars):\n  KAK Industry DBC K-SPEC BCG — the first bolt carrier group engineered for FRT triggers. Run a standard buffer with any FRT. 9310 steel, dual ejectors. $199.99.\n  COUNT: 160 — trim:\n  KAK K-SPEC BCG — first BCG built for FRT triggers. Run standard buffer with any FRT. 9310 steel, dual ejectors, patent pending. $199.99.\n  COUNT: 138 ✓\n\n  URL HANDLE:\n  \/products\/kak-industry-dbc-k-spec-bcg-frt-ar15\n\n  SHOPIFY TAGS:\n  kak bcg, kak k-spec bcg, dbc bcg, bcg for frt, frt bcg, forced reset trigger bcg,\n  best bcg for frt, ar15 bcg upgrade, m16 bcg ar15, ar-15 bolt carrier group,\n  suppressed ar15 bcg, dual ejector bcg, 9310 steel bcg, mag phosphate bcg,\n  chrome lined bcg, ar15 frt parts, frt trigger accessories, ar15 accessories,\n  ar-15 parts, ar15 parts usa made, kak industry, frt parts ar15,\n  best ar15 bcg, ar15 upgrade parts, ar15 bolt carrier, ar15 build parts\n--\u003e\n\n\n\u003c!-- ============ BLOCK 2: SCHEMA (JSON-LD) ============ --\u003e\n\u003c!--\n  Paste into theme.liquid inside \u003chead\u003e, wrapped in:\n  {% if product.handle == 'kak-industry-dbc-k-spec-bcg-frt-ar15' %}\n  ...\n  {% endif %}\n--\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"KAK Industry DBC K-SPEC BCG | First BCG Built for FRT Triggers | AR-15\",\n  \"description\": \"KAK Industry DBC K-SPEC Bolt Carrier Group — the first BCG engineered specifically for forced reset trigger use. Floating dead-blow weight in carrier tail eliminates bolt bounce, allowing a standard 3oz carbine buffer with any FRT. Tested with Hoffman Tactical Super Safety, AS Designs ARC-Fire, Atrius Development FRS, and Rare Breed FRT. 9310 steel bolt, M16 full-auto profile, dual ejectors, downward gas vents, chrome-lined, mag phosphate finish. Patent US 12,474,132 B2. $199.99.\",\n  \"image\": [],\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"KAK Industry\"\n  },\n  \"manufacturer\": {\n    \"@type\": \"Organization\",\n    \"name\": \"KAK Industry\",\n    \"address\": {\n      \"@type\": \"PostalAddress\",\n      \"addressCountry\": \"US\",\n      \"addressRegion\": \"MO\"\n    }\n  },\n  \"award\": \"Patent US 12,474,132 B2\",\n  \"sku\": \"KAK-DBC-KSPEC-BCG\",\n  \"mpn\": \"KAK-DBC-KSPEC-BCG\",\n  \"material\": \"9310 Steel Bolt — 8620 Steel Carrier\",\n  \"color\": \"Mag Phosphate \/ Chrome-Lined\",\n  \"weight\": \"14.5oz\",\n  \"countryOfOrigin\": \"US\",\n  \"category\": \"Firearm Parts \u003e AR-15 \u003e Bolt Carrier Groups\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/www.artakedowntool.com\/products\/kak-industry-dbc-k-spec-bcg-frt-ar15\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"199.99\",\n    \"priceValidUntil\": \"2026-12-31\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"shippingDetails\": {\n      \"@type\": \"OfferShippingDetails\",\n      \"shippingRate\": { \"@type\": \"MonetaryAmount\", \"value\": \"0\", \"currency\": \"USD\" },\n      \"shippingDestination\": { \"@type\": \"DefinedRegion\", \"addressCountry\": \"US\" },\n      \"deliveryTime\": {\n        \"@type\": \"ShippingDeliveryTime\",\n        \"handlingTime\": { \"@type\": \"QuantitativeValue\", \"minValue\": 0, \"maxValue\": 1, \"unitCode\": \"DAY\" },\n        \"transitTime\": { \"@type\": \"QuantitativeValue\", \"minValue\": 2, \"maxValue\": 5, \"unitCode\": \"DAY\" }\n      }\n    },\n    \"hasMerchantReturnPolicy\": {\n      \"@type\": \"MerchantReturnPolicy\",\n      \"applicableCountry\": \"US\",\n      \"returnPolicyCategory\": \"https:\/\/schema.org\/MerchantReturnFiniteReturnWindow\",\n      \"merchantReturnDays\": 30,\n      \"returnMethod\": \"https:\/\/schema.org\/ReturnByMail\",\n      \"returnFees\": \"https:\/\/schema.org\/FreeReturn\"\n    },\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"The Takedown Tools\",\n      \"url\": \"https:\/\/www.artakedowntool.com\"\n    }\n  },\n  \"additionalProperty\": [\n    { \"@type\": \"PropertyValue\", \"name\": \"FRT Compatibility\",    \"value\": \"Hoffman Tactical Super Safety, AS Designs ARC-Fire, Atrius Development FRS, Rare Breed FRT — and similarly designed FRT systems\" },\n    { \"@type\": \"PropertyValue\", \"name\": \"Buffer Requirement\",   \"value\": \"Standard 3oz carbine buffer — H2\/H3 no longer required\" },\n    { \"@type\": \"PropertyValue\", \"name\": \"Dead-Blow Feature\",    \"value\": \"Floating weight in carrier tail eliminates bolt bounce\" },\n    { \"@type\": \"PropertyValue\", \"name\": \"Bolt Material\",        \"value\": \"9310 Steel — Magnetic Particle Inspected\" },\n    { \"@type\": \"PropertyValue\", \"name\": \"Carrier Material\",     \"value\": \"8620 Steel — chrome-lined, ground to .0002 tolerances\" },\n    { \"@type\": \"PropertyValue\", \"name\": \"Carrier Profile\",      \"value\": \"M16 Full-Auto\" },\n    { \"@type\": \"PropertyValue\", \"name\": \"Finish\",               \"value\": \"Mag Phosphate — bolt and carrier; 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It contains a floating weight in the carrier tail that creates a dead-blow effect — eliminating bolt bounce that causes FRT malfunctions. This allows the rifle to function reliably with a standard 3oz carbine buffer instead of the H2 or H3 weights typically required for FRT builds. Additionally it features dual ejectors, downward gas venting, slotted angled carrier rails, and chrome-lined internals ground to .0002 tolerances — all in one package. Patent US 12,474,132 B2.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I run a standard buffer with the K-SPEC BCG and an FRT?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The K-SPEC's floating dead-blow weight in the carrier tail provides enough mass and shock absorption to allow a standard 3oz carbine buffer to work reliably with an FRT. This eliminates the need for heavier H2 or H3 buffer weights that are normally required to tune FRT builds. As with all FRT setups, individual firearms may require fine-tuning — but the K-SPEC is specifically engineered to make the standard buffer work where it couldn't before.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which FRT systems has the K-SPEC been tested with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"KAK Industry has tested the K-SPEC BCG successfully with the Hoffman Tactical Super Safety, AS Designs ARC-Fire FRS, Atrius Development FRS, and Rare Breed FRT. Similarly designed FRT systems should also work. Testing was conducted by KAK Industry as part of the patent development process.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the dead-blow floating weight?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The K-SPEC carrier tail contains a floating weight that moves independently during the BCG's travel cycle. As the carrier reaches the rear of its travel, the floating weight continues forward, creating a counteracting force that eliminates bolt bounce — the primary cause of FRT malfunction on standard BCGs. This dead-blow effect is the core innovation of the K-SPEC and what makes it uniquely suited for FRT use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What cartridges is the K-SPEC compatible with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The K-SPEC BCG is compatible with .223 Remington, 5.56 NATO, and .300 Blackout. It fits all standard AR-15 mil-spec uppers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does the K-SPEC work suppressed?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — and it is specifically engineered for suppressed use. The downward gas venting relocates gas ports from the ejection port side to underneath the carrier in the magazine feed lip channels, reducing gas blowback to the shooter's face. KAK's testing shows the down-vent design also reduces peak decibel levels when used with a suppressor. No additional tuning of the gas or recoil system is required to run suppressed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the dual ejector system?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The K-SPEC uses two mil-spec ejectors and springs rather than the standard single ejector. The dual ejector system increases ejection reliability and adds consistency to the ejection pattern — especially important in high-cyclic-rate FRT applications where inconsistent ejection is a common issue. Ejector holes are centered on the lugs to maintain bolt strength. Both ejectors are S7 tool steel, ground and heat treated.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the K-SPEC made in the USA?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The KAK K-SPEC is machined entirely in-house at KAK Industry's Missouri facility using Doosan machining centers, Tsugami Swiss turning, and FANUC robotics in an automated cell. In-house CMM inspection ensures consistent quality. 100% USA made.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\n\u003c!-- ============ BLOCK 3: DESCRIPTION HTML ============ --\u003e\n\u003c!-- Paste into Shopify product description editor in HTML\/code view --\u003e\n\n\u003cdiv id=\"pw\"\u003e\n\n\u003cstyle\u003e\n  #pw { font-family: 'DM Sans', sans-serif; font-size: 15px; line-height: 1.75; }\n  #pw, #pw * { color: inherit; }\n  #pw p, #pw li, #pw td, #pw div, #pw span { color: #111111 !important; }\n  #pw h1, #pw h2, #pw h3 { color: #111111 !important; }\n  #pw strong { color: #111111 !important; }\n  #pw a { color: #b07a28 !important; text-decoration: none !important; }\n  #pw a:hover { text-decoration: underline !important; }\n\n  \/* namespace: .kak *\/\n  #pw .kak-badge { display: inline-block !important; background: #b07a28 !important; color: #000000 !important; font-size: 10px !important; font-weight: 700 !important; letter-spacing: .12em !important; text-transform: uppercase !important; 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padding-top: 16px !important; border-top: 1px solid #dddddd !important; font-size: 12.5px !important; color: #888888 !important; line-height: 1.6 !important; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"kak-badge\"\u003eKAK Industry · K-SPEC DBC BCG · First BCG Built for FRT Triggers · Patent US 12,474,132 B2 · USA Made\u003c\/div\u003e\n\n\u003cp class=\"kak-intro\"\u003eThe \u003cstrong\u003eKAK Industry DBC K-SPEC BCG\u003c\/strong\u003e is the first bolt carrier group ever engineered specifically for forced reset triggers. Every other BCG on the market was designed for standard semi-auto use — FRT builders adapted them as best they could, stacking buffer weight on buffer weight to tune reliability. The K-SPEC eliminates that problem entirely with a patented floating dead-blow weight in the carrier tail that allows any FRT to run on a \u003cstrong\u003estandard 3oz carbine buffer\u003c\/strong\u003e — the one that came in your rifle.\u003c\/p\u003e\n\n\u003cp class=\"kak-intro\"\u003eThe buffer tuning problem is the number one reliability complaint in the FRT world. KAK patented the solution.\u003c\/p\u003e\n\n\u003cdiv class=\"kak-patent\"\u003e\n  \u003cdiv class=\"kak-patent-label\"\u003ePatent US 12,474,132 B2\u003c\/div\u003e\n  \u003cp\u003eThe K-SPEC's floating dead-blow carrier tail weight is a patented innovation — the first of its kind in the AR-15 BCG market. This is not a marketing claim. It is a granted US patent.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- THE BUFFER STORY — lead with the problem\/solution --\u003e\n\u003cdiv class=\"kak-buffer-callout\"\u003e\n  \u003cdiv class=\"kak-bc-label\"\u003eThe Problem Every FRT Builder Knows\u003c\/div\u003e\n  \u003cp\u003eEvery FRT on the market requires a heavier buffer — typically H2 or H3 — to function reliably. That extra weight slows bolt velocity enough for the FRT's reset mechanism to engage before the bolt returns to battery. Get it wrong and you get bolt bounce, failure to reset, or the trigger locking up. FRT builders spend hours tuning buffer weight, spring rate, and gas settings chasing reliability.\u003c\/p\u003e\n  \u003cbr\u003e\n  \u003cp\u003eThe \u003cstrong\u003eK-SPEC eliminates this.\u003c\/strong\u003e A floating weight inside the carrier tail creates a dead-blow effect — absorbing and counteracting bolt bounce mechanically, inside the BCG itself. Standard 3oz carbine buffer. No H weights. No tuning. Drop it in and run.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"kak-h2\"\u003eConfirmed FRT Compatibility — Tested by KAK Industry\u003c\/h2\u003e\n\u003cp\u003eKAK tested the K-SPEC with the major active reset systems on the market as part of the patent development process:\u003c\/p\u003e\n\u003cdiv class=\"kak-tested\"\u003e\n  \u003cdiv class=\"kak-tested-item\"\u003e\u003cp\u003eHoffman Tactical Super Safety\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"kak-tested-item\"\u003e\u003cp\u003eAS Designs ARC-Fire FRS\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"kak-tested-item\"\u003e\u003cp\u003eAtrius Development FRS\u003c\/p\u003e\u003c\/div\u003e\n  \u003cdiv class=\"kak-tested-item\"\u003e\u003cp\u003eRare Breed FRT\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:13.5px; color:#555555 !important;\"\u003eSimilarly designed FRT and active reset systems should also be compatible. As with all FRT builds, individual firearms may require fine-tuning — but the K-SPEC is specifically engineered to eliminate the buffer weight variable from that equation.\u003c\/p\u003e\n\n\u003ch2 class=\"kak-h2\"\u003eWhat Makes the K-SPEC Different\u003c\/h2\u003e\n\u003cul class=\"kak-features\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFloating dead-blow weight — carrier tail\u003c\/strong\u003e — the core innovation. A weight inside the carrier tail moves independently during the BCG cycle, counteracting bolt bounce at the rear of travel. This is what allows a standard buffer to work with an FRT. Patent US 12,474,132 B2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual ejector system\u003c\/strong\u003e — two S7 tool steel mil-spec ejectors replace the standard single ejector. Increases ejection reliability and consistency in the ejection pattern — critical in high-cyclic-rate FRT applications where single ejectors can be marginal. Ejector holes centered on lugs maintain full bolt strength\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDownward gas venting\u003c\/strong\u003e — standard gas ports relocated from the ejection port side to the underside of the carrier in the magazine feed lip channels. Less gas to the face, reduced blowback, quieter suppressed report. Two additional emergency relief ports added at the bottom for structural protection in case of case head separation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSlotted angled carrier rails (sandcutter)\u003c\/strong\u003e — strategically angled cuts move carbon fouling and debris into non-critical areas away from the upper receiver contact surfaces. Designed for adverse conditions including sand, mud, dirt, and prolonged suppressor fouling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e9310 steel bolt — MPI tested\u003c\/strong\u003e — 9310 is the highest-strength steel used in AR-15 bolts. Every bolt receives magnetic particle inspection, the most reliable method for detecting internal defects. Outside diameters ground to .0002 tolerances\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8620 steel carrier — chrome-lined\u003c\/strong\u003e — chrome lining on the bolt run, rails, and gas bores provides a harder, more durable surface for long-term cycling. Ground to .0002 tolerances throughout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePermatex gas key seal\u003c\/strong\u003e — applied between gas key and carrier mating surface, preventing gas leakage at the key joint. Gas key is chrome-lined, hydraulically staked, and torqued to spec with T25 torx fasteners\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuppressor-optimized no-tune\u003c\/strong\u003e — runs suppressed or unsuppressed with no changes to gas or recoil system. Zero additional tuning required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 class=\"kak-h2\"\u003eComponent Steel Breakdown\u003c\/h2\u003e\n\u003cdiv class=\"kak-steel-grid\"\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eBolt\u003c\/div\u003e\n    \u003cp\u003e9310 Steel — MPI tested, phosphate finish, .0002 tolerance ground\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eCarrier\u003c\/div\u003e\n    \u003cp\u003e8620 Steel — chrome-lined, phosphate finish, .0002 tolerance ground\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eFiring Pin\u003c\/div\u003e\n    \u003cp\u003e8740 Steel — Swiss turned, heat treated, chrome plated\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eCam Pin\u003c\/div\u003e\n    \u003cp\u003e4140 Steel — Swiss turned, heat treated, phosphate\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eEjectors\u003c\/div\u003e\n    \u003cp\u003eS7 Tool Steel — ground, heat treated (dual)\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eExtractor Pin\u003c\/div\u003e\n    \u003cp\u003eS7 Tool Steel — ground, heat treated\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eExtractor\u003c\/div\u003e\n    \u003cp\u003e4140 Steel — fully machined, phosphate finish\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kak-steel-item\"\u003e\n    \u003cdiv class=\"kak-steel-label\"\u003eGas Key\u003c\/div\u003e\n    \u003cp\u003e4130 Steel — chrome-lined, hydraulically staked, T25 torx, torqued to spec\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"kak-h2\"\u003eFull Specs\u003c\/h2\u003e\n\u003ctable class=\"kak-specs\"\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eAR-15 — all mil-spec uppers\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCartridge\u003c\/td\u003e\n\u003ctd\u003e.223 Remington \/ 5.56 NATO \/ .300 Blackout\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBolt Material\u003c\/td\u003e\n\u003ctd\u003e9310 Steel — Magnetic Particle Inspected\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCarrier Material\u003c\/td\u003e\n\u003ctd\u003e8620 Steel — chrome-lined\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCarrier Profile\u003c\/td\u003e\n\u003ctd\u003eM16 Full-Auto\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eMag Phosphate — bolt and carrier exterior; Chrome-lined — carrier internals and gas key\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eEjector System\u003c\/td\u003e\n\u003ctd\u003eDual — S7 tool steel, mil-spec springs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eGas Venting\u003c\/td\u003e\n\u003ctd\u003eDownward — relocated to magazine feed lip channels\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCarrier Rails\u003c\/td\u003e\n\u003ctd\u003eSlotted angled sandcutter cuts\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDead-Blow Feature\u003c\/td\u003e\n\u003ctd\u003eFloating weight in carrier tail — Patent US 12,474,132 B2\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFRT Buffer Requirement\u003c\/td\u003e\n\u003ctd\u003eStandard 3oz carbine buffer — H weights no longer required\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e14.5oz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e7.7\" L x 1\" W x 1.4\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA — machined in-house, Missouri\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePatent\u003c\/td\u003e\n\u003ctd\u003eUS 12,474,132 B2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"kak-mfg\"\u003e\n  \u003cdiv class=\"kak-mfg-label\"\u003eKAK Industry Manufacturing — Missouri, USA\u003c\/div\u003e\n  \u003cp\u003eThe K-SPEC is machined entirely in-house at KAK Industry's Missouri facility using Doosan machining centers, Tsugami Swiss turning, and FANUC robotics in an automated cell with lights-out production capability. In-house automated CMM inspection processes ensure consistent quality on every unit. No outsourced components. No overseas machining. Every K-SPEC is made start to finish under one roof in the USA.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"kak-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"kak-faq\"\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eWhat makes the K-SPEC different from a standard M16 BCG?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003eThe K-SPEC is the first BCG engineered specifically for FRT use. It contains a floating dead-blow weight in the carrier tail that eliminates bolt bounce — the primary cause of FRT malfunction. This allows a standard 3oz carbine buffer to work reliably with any FRT, eliminating the H2\/H3 buffer weight requirement. It also features dual ejectors, downward gas venting, slotted angled carrier rails, and chrome-lined internals ground to .0002 tolerances. Patent US 12,474,132 B2.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eCan I really run a standard buffer with an FRT using this BCG?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003eYes. The K-SPEC's patented floating weight in the carrier tail provides the dead-blow effect that allows a standard 3oz carbine buffer to work reliably with FRT and active reset trigger systems. KAK Industry tested this with the Hoffman Tactical Super Safety, AS Designs ARC-Fire, Atrius Development FRS, and Rare Breed FRT. As with all FRT builds, individual rifles may require some fine-tuning — but the K-SPEC eliminates the buffer weight variable from that equation.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eWhich FRT systems has the K-SPEC been tested with?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003eKAK has tested the K-SPEC with the Hoffman Tactical Super Safety, AS Designs ARC-Fire FRS, Atrius Development FRS, and Rare Breed FRT. Similarly designed FRT and active reset systems should also be compatible.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eWhat is the dead-blow floating weight?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003eThe K-SPEC carrier tail contains a floating weight that moves independently during the BCG's travel cycle. As the carrier reaches the rear of its travel, the floating weight continues forward — creating a counteracting force that eliminates bolt bounce before it can interfere with the FRT's reset mechanism. This is the core of Patent US 12,474,132 B2 and what makes the K-SPEC uniquely suited for FRT use.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eDoes the K-SPEC work suppressed?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003eYes — it is specifically engineered for suppressed use. Downward gas venting reduces blowback to the shooter's face and lowers the suppressed decibel report. No additional tuning of the gas or recoil system is required to run suppressed. The sandcutter carrier rails also handle the increased carbon fouling from prolonged suppressed fire.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eWhat cartridges does the K-SPEC support?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003e.223 Remington, 5.56 NATO, and .300 Blackout. Fits all standard AR-15 mil-spec uppers.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"kak-faq-item\"\u003e\n    \u003csummary\u003eIs the K-SPEC made in the USA?\u003c\/summary\u003e\n    \u003cdiv class=\"kak-faq-answer\"\u003eYes. Machined entirely in-house at KAK Industry's Missouri facility using Doosan machining centers, Tsugami Swiss turning, and FANUC robotics. In-house CMM inspection on every unit. 100% USA made from start to finish.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003ch2 class=\"kak-h2\"\u003ePairs With\u003c\/h2\u003e\n\u003cul class=\"kak-links\"\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/super-safety\"\u003eHoffman Tactical Super Safety — Active Reset Selector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/kabuto-frt-metal-ambi-selector-ar15\"\u003eKabuto FRT — Metal Ambi Selector ($129.99)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/trigger-supply-ar15-anti-walk-pins\"\u003eTrigger Supply AR-15 Anti-Walk Pins ($24.99)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/ar-15-buffers\"\u003eAR-15 Buffers — H2, H2.5, H3 (for standard BCG builds)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/best-frt-triggers-for-ar-15\"\u003eBest FRT Triggers for AR-15 — 2026 Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/are-frt-triggers-legal\"\u003eAre FRT Triggers Legal? — State-by-State Guide\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/blogs\/blogs\/how-forced-reset-triggers-work\"\u003eHow Forced Reset Triggers Work — Complete Explainer\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp class=\"kak-disclaimer\"\u003eAs with all FRT and active reset trigger builds, individual firearms may require fine-tuning for optimal reliability. KAK Industry's testing results are based on their testing conditions and may not reflect every possible rifle configuration. It is the buyer's responsibility to safely test and tune their specific firearm. Comply with all applicable local, state, and federal laws regarding firearm parts and accessories. Patent US 12,474,132 B2.\u003c\/p\u003e\n\n\u003c\/div\u003e\n","brand":"KAK","offers":[{"title":"Default Title","offer_id":48604066250997,"sku":null,"price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/KAK-DBC-frt-bcg.webp?v=1789587445"},{"product_id":"trigger-supply-rainbow-pvd-ar15-bcg-high-polish","title":"Trigger Supply Rainbow PVD BCG | High Polish AR-15 Bolt Carrier Group | USA Made","description":"\u003c!-- ============================================================\n     TRIGGER SUPPLY — RAINBOW PVD HIGH POLISH AR-15 BCG\n     Price: $189.99\n     URL: \/products\/trigger-supply-rainbow-pvd-ar15-bcg-high-polish\n     Brand: Trigger Supply\n     \n     SEO STRATEGY: Owns \"rainbow PVD BCG,\" \"rainbow BCG AR-15,\"\n     \"PVD AR-15 bolt carrier group.\" Secondary: \"high polish BCG,\"\n     \"colored BCG AR-15,\" \"AR-15 BCG upgrade.\" Completely separate\n     keyword cluster from the M16 USA-made BCG at $149.99 —\n     aesthetic\/finish angle vs utility angle. Zero cannibalization.\n============================================================ --\u003e\n\n\n\u003c!-- ============ BLOCK 1: SEO FIELDS ============ --\u003e\n\u003c!--\n  PRODUCT TITLE:\n  Trigger Supply Rainbow PVD BCG | High Polish AR-15 Bolt Carrier Group | USA Made\n\n  SEO TITLE (58 chars):\n  Trigger Supply Rainbow PVD BCG | High Polish AR-15 USA\n  COUNT: 54 ✓\n\n  META DESCRIPTION (151 chars):\n  Trigger Supply Rainbow PVD AR-15 BCG. High polish finish, M16 cut, 9310 steel, Carpenter 158 bolt. Magnetic particle inspected. USA made. $189.99 in stock.\n  COUNT: 157 — trim:\n  Trigger Supply Rainbow PVD AR-15 BCG. High polish, M16 cut, Carpenter 158 bolt, MPI tested. USA made. $189.99 in stock, ships fast.\n  COUNT: 132 ✓\n\n  URL HANDLE:\n  \/products\/trigger-supply-rainbow-pvd-ar15-bcg-high-polish\n\n  SHOPIFY TAGS:\n  rainbow pvd bcg, rainbow bcg ar15, pvd bcg, pvd ar15 bcg,\n  colored bcg ar15, rainbow bolt carrier group, high polish bcg,\n  trigger supply bcg, ar15 bcg upgrade, m16 cut bcg, ar15 bolt carrier group,\n  carpenter 158 bolt, 9310 steel bcg, mpi bcg, magnetic particle inspected bcg,\n  usa made bcg ar15, ar15 parts usa made, ar15 accessories, colored ar15 parts,\n  rainbow ar15 parts, pvd finish ar15, ar15 build parts\n--\u003e\n\n\n\u003c!-- ============ BLOCK 2: SCHEMA (JSON-LD) ============ --\u003e\n\u003c!--\n  NOTE: Product schema omitted — Shopify auto-generates Product JSON-LD.\n  Adding a second Product schema causes Merchant Listings conflict.\n  FAQPage only — adds FAQ rich results without duplicating Product schema.\n\n  Paste into product description editor in HTML view.\n  OR paste into theme.liquid wrapped in:\n  {% if product.handle == 'trigger-supply-rainbow-pvd-ar15-bcg-high-polish' %}\n  ...\n  {% endif %}\n--\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is PVD finish on an AR-15 BCG?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVD stands for Physical Vapor Deposition — a vacuum coating process that deposits an extremely thin, hard layer of material onto the surface of the BCG components. PVD produces the rainbow iridescent color effect while adding a harder, more wear-resistant surface than standard phosphate or nitride finishes. The high polish preparation before PVD gives the final finish its mirror-like reflective quality.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What steel is the bolt made from?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The bolt is machined from Carpenter 158 steel — the original mil-spec bolt steel specified by the US military for M16 and AR-15 bolts. Carpenter 158 is a chrome-moly-vanadium alloy specifically formulated for bolt lugs under the stress of repeated firing cycles. Every bolt is magnetic particle inspected (MPI) for internal defects before leaving the factory.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this BCG M16 cut?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The Trigger Supply Rainbow PVD BCG uses an M16 full auto cut carrier profile. In a semi-auto lower it functions identically to a standard BCG — the M16 cut adds mass for smoother, more reliable cycling without any legal concerns. Compatible with all mil-spec AR-15 uppers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will the rainbow PVD finish hold up under hard use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PVD is one of the hardest surface coatings available for firearm components — harder than phosphate and comparable to nitride. The coating is extremely thin (measured in microns) and bonds at a molecular level to the substrate steel, meaning it does not chip or peel like paint. The rainbow color will remain vibrant under normal use and cleaning. Like all BCG finishes, sustained high round counts and harsh cleaning chemicals will eventually show wear over time.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What makes this BCG different from a standard mil-spec BCG?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Three things. First, the Rainbow PVD finish — a Physical Vapor Deposition coating process that produces the iridescent color and adds a harder wear surface than standard phosphate. Second, high polished components — every surface is polished before PVD coating, giving the BCG a mirror quality that standard BCGs don't have. Third, Carpenter 158 steel bolt — the original mil-spec bolt alloy, magnetic particle inspected. Everything else — M16 cut, mil-spec gas rings, mil-spec O-ring, 4140 cam pin, 8740 firing pin — runs to standard mil-spec.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the Trigger Supply Rainbow PVD BCG made in the USA?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The Trigger Supply Rainbow PVD BCG is 100% USA made.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\n\u003c!-- ============ BLOCK 3: DESCRIPTION HTML ============ --\u003e\n\u003c!-- Paste into Shopify product description editor in HTML\/code view --\u003e\n\n\u003cdiv id=\"pw\"\u003e\n\n\u003cstyle\u003e\n  #pw { font-family: 'DM Sans', sans-serif; font-size: 15px; line-height: 1.75; }\n  #pw, #pw * { color: inherit; }\n  #pw p, #pw li, #pw td, #pw div, #pw span { color: #111111 !important; }\n  #pw h1, #pw h2, #pw h3 { color: #111111 !important; }\n  #pw strong { color: #111111 !important; }\n  #pw a { color: #b07a28 !important; text-decoration: none !important; }\n  #pw a:hover { text-decoration: underline !important; }\n\n  \/* namespace: .pvd *\/\n  #pw .pvd-badge { display: inline-block !important; background: linear-gradient(90deg, #b07a28, #8a5cb8, #2a7ab0, #2a8a4a) !important; color: #ffffff !important; font-size: 10px !important; font-weight: 700 !important; letter-spacing: .12em !important; text-transform: uppercase !important; padding: 3px 10px !important; border-radius: 2px !important; margin-bottom: 14px !important; }\n  #pw .pvd-intro { font-size: 15.5px !important; color: #111111 !important; margin-bottom: 14px !important; line-height: 1.8 !important; }\n  #pw .pvd-h2 { font-size: 17px !important; font-weight: 700 !important; color: #111111 !important; margin: 32px 0 12px !important; padding-bottom: 8px !important; border-bottom: 2px solid #dddddd !important; }\n  #pw .pvd-features { list-style: none !important; padding: 0 !important; margin: 0 0 20px !important; }\n  #pw .pvd-features li { padding: 10px 0 !important; border-bottom: 1px solid #eeeeee !important; font-size: 15px !important; color: #111111 !important; display: flex !important; gap: 10px !important; align-items: flex-start !important; line-height: 1.55 !important; }\n  #pw .pvd-features li:last-child { border-bottom: none !important; }\n  #pw .pvd-features li::before { content: '—' !important; color: #b07a28 !important; flex-shrink: 0 !important; font-weight: 700 !important; margin-top: 2px !important; }\n  #pw .pvd-steel-grid { display: grid !important; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)) !important; gap: 10px !important; margin: 14px 0 24px !important; }\n  #pw .pvd-steel-item { background: #f7f7f7 !important; border: 1px solid #e4e4e4 !important; border-radius: 6px !important; padding: 13px 15px !important; }\n  #pw .pvd-steel-label { font-size: 10px !important; font-weight: 700 !important; letter-spacing: .1em !important; text-transform: uppercase !important; color: #b07a28 !important; margin-bottom: 4px !important; }\n  #pw .pvd-steel-item p { margin: 0 !important; font-size: 13px !important; color: #444444 !important; line-height: 1.5 !important; }\n  #pw .pvd-specs { width: 100% !important; border-collapse: collapse !important; margin: 12px 0 24px !important; font-size: 14px !important; }\n  #pw .pvd-specs tr { border-bottom: 1px solid #eeeeee !important; }\n  #pw .pvd-specs tr:last-child { border-bottom: none !important; }\n  #pw .pvd-specs td { padding: 10px 12px !important; color: #111111 !important; vertical-align: top !important; }\n  #pw .pvd-specs td:first-child { font-weight: 600 !important; width: 40% !important; color: #555555 !important; }\n  #pw .pvd-specs tr:nth-child(even) td { background: #f9f9f9 !important; }\n  #pw .pvd-compare { display: grid !important; grid-template-columns: 1fr 1fr !important; gap: 12px !important; margin: 14px 0 24px !important; }\n  #pw .pvd-compare-item { background: #f7f7f7 !important; border: 1px solid #e4e4e4 !important; border-radius: 6px !important; padding: 14px 16px !important; }\n  #pw .pvd-compare-label { font-size: 10px !important; font-weight: 700 !important; letter-spacing: .1em !important; text-transform: uppercase !important; color: #b07a28 !important; margin-bottom: 6px !important; }\n  #pw .pvd-compare-item p { font-size: 13.5px !important; color: #444444 !important; margin: 0 !important; line-height: 1.5 !important; }\n  #pw .pvd-upsell { background: #fdf9f2 !important; border: 1px solid #e8d8c0 !important; border-left: 3px solid #b07a28 !important; border-radius: 0 6px 6px 0 !important; padding: 14px 18px !important; margin: 20px 0 !important; font-size: 14px !important; color: #111111 !important; }\n  #pw .pvd-upsell-label { font-size: 10px !important; font-weight: 700 !important; letter-spacing: .12em !important; text-transform: uppercase !important; color: #b07a28 !important; margin-bottom: 5px !important; }\n  #pw .pvd-upsell p { margin: 0 !important; color: #111111 !important; font-size: 14px !important; }\n  #pw .pvd-faq { margin: 12px 0 0 !important; }\n  #pw .pvd-faq-item { border-bottom: 1px solid #eeeeee !important; }\n  #pw .pvd-faq-item summary { cursor: pointer !important; list-style: none !important; padding: 14px 0 !important; font-weight: 600 !important; font-size: 14.5px !important; color: #111111 !important; display: flex !important; justify-content: space-between !important; align-items: center !important; gap: 12px !important; }\n  #pw .pvd-faq-item summary::-webkit-details-marker { display: none !important; }\n  #pw .pvd-faq-item summary::after { content: '+' !important; color: #b07a28 !important; font-size: 18px !important; font-weight: 300 !important; flex-shrink: 0 !important; }\n  #pw .pvd-faq-item[open] summary::after { content: '×' !important; }\n  #pw .pvd-faq-answer { padding: 0 0 16px !important; font-size: 14px !important; color: #444444 !important; line-height: 1.7 !important; }\n  #pw .pvd-links { list-style: none !important; padding: 0 !important; margin: 12px 0 0 !important; }\n  #pw .pvd-links li { padding: 7px 0 !important; border-bottom: 1px solid #eeeeee !important; font-size: 14px !important; }\n  #pw .pvd-links li:last-child { border-bottom: none !important; }\n  #pw .pvd-disclaimer { margin-top: 28px !important; padding-top: 16px !important; border-top: 1px solid #dddddd !important; font-size: 12.5px !important; color: #888888 !important; line-height: 1.6 !important; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"pvd-badge\"\u003eTrigger Supply · Rainbow PVD · High Polish · M16 Cut · Carpenter 158 · MPI · USA Made\u003c\/div\u003e\n\n\u003cp class=\"pvd-intro\"\u003eThe \u003cstrong\u003eTrigger Supply Rainbow PVD BCG\u003c\/strong\u003e is the build piece that makes your AR-15 stand out without sacrificing anything on reliability. Physical Vapor Deposition coating over high-polished components produces the iridescent rainbow finish — every unit catches light differently. Under that finish is a fully spec'd Carpenter 158 steel bolt, M16 cut carrier, mil-spec gas rings and O-ring, and magnetic particle inspection on every bolt before it ships.\u003c\/p\u003e\n\n\u003cp class=\"pvd-intro\"\u003eIt looks like nothing else on the market. It runs like a mil-spec BCG should.\u003c\/p\u003e\n\n\u003ch2 class=\"pvd-h2\"\u003eWhat Makes It Different\u003c\/h2\u003e\n\u003cdiv class=\"pvd-compare\"\u003e\n  \u003cdiv class=\"pvd-compare-item\"\u003e\n    \u003cdiv class=\"pvd-compare-label\"\u003eRainbow PVD Finish\u003c\/div\u003e\n    \u003cp\u003ePhysical Vapor Deposition deposits an extremely thin, molecularly bonded coating that produces the iridescent rainbow color. Harder than phosphate, does not chip or peel. The finish is applied over high-polished components — the polish is what gives the reflection, the PVD is what gives the color and durability.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-compare-item\"\u003e\n    \u003cdiv class=\"pvd-compare-label\"\u003eHigh Polished Components\u003c\/div\u003e\n    \u003cp\u003eEvery carrier and bolt surface is polished before PVD coating. The result is a mirror-quality finish that no standard BCG produces. High polish also reduces friction at contact surfaces for smoother cycling — form and function together.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"pvd-h2\"\u003eFeatures\u003c\/h2\u003e\n\u003cul class=\"pvd-features\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRainbow PVD finish\u003c\/strong\u003e — Physical Vapor Deposition iridescent coating over high-polished components. Harder than phosphate, bonds at molecular level\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCarpenter 158 steel bolt\u003c\/strong\u003e — the original mil-spec bolt alloy specified by the US military. Chrome-moly-vanadium formulated specifically for bolt lugs under repeated firing stress\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMagnetic particle inspected (MPI)\u003c\/strong\u003e — every bolt inspected for internal defects before leaving the factory. The most reliable non-destructive testing method for bolt integrity\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eM16 full auto cut carrier\u003c\/strong\u003e — heavier carrier profile for smoother, more reliable cycling. Functions as standard semi-auto in any mil-spec lower\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMil-spec gas rings\u003c\/strong\u003e — standard mil-spec gas ring set for consistent gas seal and reliable cycling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMil-spec O-ring\u003c\/strong\u003e — standard mil-spec O-ring for gas retention\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8740 steel firing pin — hard chrome finish\u003c\/strong\u003e — high-strength firing pin alloy with hard chrome plating for long-term durability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4140 steel cam pin and extractor\u003c\/strong\u003e — standard mil-spec alloys for both components\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e100% USA made\u003c\/strong\u003e — all components manufactured domestically\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 class=\"pvd-h2\"\u003eComponent Steel Breakdown\u003c\/h2\u003e\n\u003cdiv class=\"pvd-steel-grid\"\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eCarrier\u003c\/div\u003e\n    \u003cp\u003e9310 Steel — Rainbow PVD finish over high polish\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eBolt\u003c\/div\u003e\n    \u003cp\u003eCarpenter 158 Steel — MPI tested, Rainbow PVD finish\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eFiring Pin\u003c\/div\u003e\n    \u003cp\u003e8740 Steel — hard chrome finish\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eCam Pin\u003c\/div\u003e\n    \u003cp\u003e4140 Steel — mil-spec\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eExtractor\u003c\/div\u003e\n    \u003cp\u003e4140 Steel — mil-spec\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eGas Rings\u003c\/div\u003e\n    \u003cp\u003eMil-spec — standard ring set\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pvd-steel-item\"\u003e\n    \u003cdiv class=\"pvd-steel-label\"\u003eO-Ring\u003c\/div\u003e\n    \u003cp\u003eMil-spec\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"pvd-h2\"\u003eFull Specs\u003c\/h2\u003e\n\u003ctable class=\"pvd-specs\"\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCaliber\u003c\/td\u003e\n\u003ctd\u003e.223 Rem \/ 5.56 NATO\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCarrier Profile\u003c\/td\u003e\n\u003ctd\u003eM16 Full Auto Cut\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eRainbow PVD over High Polish\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCarrier Material\u003c\/td\u003e\n\u003ctd\u003e9310 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBolt Material\u003c\/td\u003e\n\u003ctd\u003eCarpenter 158 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eExtractor Material\u003c\/td\u003e\n\u003ctd\u003e4140 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCam Pin Material\u003c\/td\u003e\n\u003ctd\u003e4140 Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFiring Pin Material\u003c\/td\u003e\n\u003ctd\u003e8740 Steel — Hard Chrome Finish\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eGas Rings\u003c\/td\u003e\n\u003ctd\u003eMil-Spec\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eO-Ring\u003c\/td\u003e\n\u003ctd\u003eMil-Spec\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eInspection\u003c\/td\u003e\n\u003ctd\u003eMagnetic Particle Inspected (MPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003eAR-15 — all mil-spec uppers\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003e100% USA Made\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"pvd-upsell\"\u003e\n  \u003cdiv class=\"pvd-upsell-label\"\u003eLooking for Utility Over Aesthetics?\u003c\/div\u003e\n  \u003cp\u003eThe \u003ca href=\"https:\/\/www.artakedowntool.com\/products\/trigger-supply-m16-full-auto-cut-bcg-usa-made\"\u003eTrigger Supply M16 Full Auto Cut BCG ($149.99)\u003c\/a\u003e is the workhorse option — same M16 cut, USA made, built specifically for FRT builds. The \u003ca href=\"https:\/\/www.artakedowntool.com\/products\/kak-industry-dbc-k-spec-bcg-frt-ar15\"\u003eKAK Industry DBC K-SPEC BCG ($199.99)\u003c\/a\u003e is the first BCG engineered specifically for forced reset triggers with a patented dead-blow weight system.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"pvd-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"pvd-faq\"\u003e\n\n  \u003cdetails class=\"pvd-faq-item\"\u003e\n    \u003csummary\u003eWhat is PVD finish on an AR-15 BCG?\u003c\/summary\u003e\n    \u003cdiv class=\"pvd-faq-answer\"\u003ePVD stands for Physical Vapor Deposition — a vacuum coating process that deposits an extremely thin, hard layer of material onto the surface of the BCG. PVD produces the rainbow iridescent color while adding a harder, more wear-resistant surface than standard phosphate or nitride. The high polish preparation before PVD gives the finish its mirror-like reflective quality.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"pvd-faq-item\"\u003e\n    \u003csummary\u003eWhat steel is the bolt made from?\u003c\/summary\u003e\n    \u003cdiv class=\"pvd-faq-answer\"\u003eCarpenter 158 steel — the original mil-spec bolt alloy specified by the US military for M16 and AR-15 bolts. It is a chrome-moly-vanadium alloy specifically formulated for bolt lug stress under repeated firing cycles. Every bolt is magnetic particle inspected (MPI) for internal defects before leaving the factory.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"pvd-faq-item\"\u003e\n    \u003csummary\u003eIs this BCG M16 cut?\u003c\/summary\u003e\n    \u003cdiv class=\"pvd-faq-answer\"\u003eYes. M16 full auto cut carrier profile. In a semi-auto lower it functions identically to a standard BCG — the M16 cut adds mass for smoother, more reliable cycling. Compatible with all mil-spec AR-15 uppers. Legal in all 50 states in semi-auto builds.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"pvd-faq-item\"\u003e\n    \u003csummary\u003eWill the rainbow PVD finish hold up under hard use?\u003c\/summary\u003e\n    \u003cdiv class=\"pvd-faq-answer\"\u003ePVD is one of the hardest surface coatings available for firearm components — harder than phosphate and comparable to nitride. It bonds at a molecular level and does not chip or peel like paint. The rainbow color remains vibrant under normal use and cleaning. Like all BCG finishes, sustained high round counts and harsh cleaning chemicals will show wear over time.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"pvd-faq-item\"\u003e\n    \u003csummary\u003eWhat makes this different from a standard mil-spec BCG?\u003c\/summary\u003e\n    \u003cdiv class=\"pvd-faq-answer\"\u003eThree things: Rainbow PVD finish over high-polished components, Carpenter 158 steel bolt (the original mil-spec alloy), and magnetic particle inspection on every bolt. Everything else — M16 cut, mil-spec gas rings, mil-spec O-ring, 4140 cam pin, 8740 firing pin — runs to standard mil-spec tolerances.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"pvd-faq-item\"\u003e\n    \u003csummary\u003eIs this made in the USA?\u003c\/summary\u003e\n    \u003cdiv class=\"pvd-faq-answer\"\u003eYes. 100% USA made.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003ch2 class=\"pvd-h2\"\u003eRelated Products\u003c\/h2\u003e\n\u003cul class=\"pvd-links\"\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/trigger-supply-m16-full-auto-cut-bcg-usa-made\"\u003eTrigger Supply M16 Full Auto Cut BCG — USA Made ($149.99)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/kak-industry-dbc-k-spec-bcg-frt-ar15\"\u003eKAK Industry DBC K-SPEC BCG — First FRT BCG ($199.99)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/products\/trigger-supply-ar15-anti-walk-pins\"\u003eTrigger Supply AR-15 Anti-Walk Pins ($24.99)\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/collections\/ar-15-buffers\"\u003eAR-15 Buffers — H2, H2.5, H3 for FRT Builds\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.artakedowntool.com\/pages\/best-frt-triggers-for-ar-15\"\u003eBest FRT Triggers for AR-15 — 2026 Buyer's Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp class=\"pvd-disclaimer\"\u003eIt is the buyer's responsibility to comply with all applicable local, state, and federal laws regarding firearm parts and accessories. Install by a qualified individual familiar with AR-15 platforms. Trigger Supply is a brand of TTT Innovations. 100% USA made.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Trigger Supply","offers":[{"title":"Default Title","offer_id":48741268586741,"sku":"PVD-BCG","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2282\/1621\/files\/bcg-pvd-finish-AR-15-M16-Cut.jpg?v=1789832987"}],"url":"https:\/\/www.artakedowntool.com\/collections\/ar-15-bolt-carrier-groups.oembed","provider":"The Takedown Tools","version":"1.0","type":"link"}