Our mirror chrome BCG, finished in deep high-polish black chrome. It's the same full auto profile carrier as our Highly Polished Mirror Chrome BCG, with the same 8620 carrier, the same MPI and HPT tested C158 bolt, and the same staked gas key. The only difference is the finish: a glossy black mirror that looks like smoked glass when you pull the charging handle, and stands out in a black upper the way silver chrome can't.
Why a High-Polish Black Chrome BCG
- A finish you'll want to show off. Polished to a true mirror, then finished in black chrome. It reads as black from across the room and shows its shine up close.
- Slick surface, smoother cycling. A polished finish slides against the receiver walls with less drag than parkerized phosphate, which helps a forced reset trigger reset the same way every shot.
- Easier cleanup. Carbon wipes off a polished surface instead of baking into a porous one.
- FRT ready. The full auto profile and properly staked gas key give a forced reset trigger the consistent carrier travel it depends on.
- Verified, not assumed. Every bolt is magnetic particle inspected and high-pressure tested before it ships.
Specifications
| Finish | Highly polished mirror black chrome |
| Compatibility | AR-15 / M4 / M16, full-auto rated |
| Calibers | 5.56x45mm NATO, .223 Remington, .300 AAC Blackout |
| Carrier profile | M16 full auto style with properly staked gas key |
| Carrier material | 8620 tool steel |
| Bolt material | C158 |
| Gas key | 4130 steel, properly staked |
| Extractor & cam pin | 4140 steel |
| Total weight | 10.5 oz |
| Dimensions | True mil-spec |
| Testing | Magnetic particle inspected (MPI) and high-pressure tested (HPT) |
| Origin | Made in the USA |
| Price | $249.99 |
Black Chrome vs. Mirror Chrome
| Black Chrome BCG | Mirror Chrome BCG | |
|---|---|---|
| Look | Glossy black mirror | Bright silver mirror |
| Carrier, bolt, gas key | 8620 / C158 / staked 4130 | 8620 / C158 / staked 4130 |
| Testing | MPI + HPT | MPI + HPT |
| Weight | 10.5 oz | 10.5 oz |
| Best match | Black uppers and blacked-out builds | Contrast builds and show rifles |
| Price | $249.99 | $249.99 |
Fitment
Fits
- AR-15, M4 and M16 pattern uppers in 5.56 NATO and .223 Remington
- .300 AAC Blackout uppers that use a standard 5.56 bolt face
- Mil-spec and forged receivers built to standard dimensions
- Semi-auto and full-auto profile lowers
Does not fit
- AR-10 / .308 platforms
- 9mm blowback uppers
- Non-standard or proprietary receivers
Running a forced reset trigger? Pair this carrier with an H2 or H3 buffer. Our FRT buffer guide explains which weight fits your gas system, and M16 BCG vs. AR-15 BCG covers why the full auto profile matters.
Care
Clean and lube it like any BCG. Normal use leaves light wear marks where the carrier rides the receiver; that's expected, not a defect. Check that your gas system and buffer weight are matched before your first range trip.
Black Chrome BCG FAQ
Is the black chrome BCG the same as your mirror chrome BCG?
Yes, apart from the color. It uses the same 8620 carrier, C158 bolt, staked 4130 gas key and 4140 extractor and cam pin, with the same MPI and HPT testing, weight and price. Only the finish changes, from silver mirror chrome to black mirror chrome.
Is black chrome the same as black nitride?
No. Nitride is a heat treatment that leaves a matte black surface. This BCG is polished to a mirror and finished in high-gloss black chrome, so it looks glossy instead of flat.
Is this BCG M16 cut?
Yes. It has a full auto (M16) carrier profile with a properly staked gas key, which is the profile most forced reset triggers call for.
Will this BCG work with a forced reset trigger?
Yes. The full auto profile and staked gas key give an FRT consistent carrier travel. Pair it with an H2 or H3 buffer and check your trigger maker's requirements.
What calibers does it work with?
5.56 NATO, .223 Remington and .300 AAC Blackout uppers that use a standard 5.56 bolt face. It does not fit AR-10, .308 or 9mm blowback uppers.
Is this BCG made in the USA?
Yes. It is made in the USA, and every bolt is magnetic particle inspected and high-pressure tested.
Complete Your Build
Compliance with all applicable federal, state, and local laws is the buyer's sole responsibility.