Armaspec SMB Gen3 H3 Sound Mitigation Buffer — Silent Captured AR-15 Buffer
Armaspec SMB Gen3 H3 Sound Mitigation Buffer — Silent Captured AR-15 Buffer

Armaspec SMB Gen3 H3 Sound Mitigation Buffer — Silent Captured AR-15 Buffer

$59.99 $79.99
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Armaspec SMB Gen3 H3 Sound Mitigation Buffer — Silent Captured AR-15 Buffer

Armaspec SMB Gen3 H3 Sound Mitigation Buffer — Silent Captured AR-15 Buffer

$59.99 $79.99
Information

Overview

The Armaspec Sound Mitigation Buffer™ Gen3 (SMB™) H3 is a single-stage captured drop-in replacement for your standard AR-15 buffer and spring. Silent operation. Adjustable spring tension. H3 weight — the recommended threshold for forced reset trigger builds, suppressed AR-15s, and short-gas platforms. Lifetime warranty. 100% USA made. $59.99.

If you're running a forced reset trigger or Super Safety on a suppressed rifle, a short-gas or sub-16" build, or any platform that demands maximum cycle control — the H3 SMB Gen3 is the buffer. More mass than the H2 minimum, silent captured operation, and fully adjustable spring tension at the same $59.99 price point.

$59.99  ·  H3 Heavy Weight (5.6 oz eq.)  ·  Silent Captured System  ·  Lifetime Warranty  ·  100% USA Made
FRT & Super Safety Recommended: The SMB Gen3 H3 at 5.6 oz equivalent weight exceeds both the H2 minimum and the H3 recommended threshold for reliable forced reset trigger and Super Safety operation on AR-15 platforms. It is especially recommended for suppressed builds, short-gas systems, and any forced reset trigger build where maximum cycle control is required. Works with the Partisan Disruptor FRT, AS Designs ARC-Fire V2, Hoffman Tactical Super Safety, and any other drop-in forced reset system on a standard AR-15 platform.

Specifications

Product Sound Mitigation Buffer™ Gen3 — H3
SKU ARM258-H3
System Type Single-stage captured drop-in — buffer + spring + guide rod
Actual Weight (Complete) 6.71 oz
Equivalent Weight 5.6 oz (H3)
Spring Adjustment Trimmable at 0.25 lbs per coil — max 12 coils
Platform AR-15 — standard carbine buffer tube
FRT Compatible Yes — exceeds H3 recommended threshold
Super Safety Compatible Yes
Suppressed Build Compatible Yes — recommended for suppressed FRT builds
Patent Pat. Pend.
Warranty Lifetime
Origin 100% USA Made
Price $59.99

What's Included

  • 1x Polymer base guide rod
  • 1x Adjustable main spring
  • 1x H3 weight buffer

Features

  • Single-stage captured system — buffer, spring, and guide rod drop in as one unit
  • H3 equivalent weight (5.6 oz) — recommended for forced reset trigger builds, suppressed builds, and short-gas platforms
  • Silent operation — spring rides on polymer guide rod, eliminating metal-on-tube contact noise
  • Reduces felt recoil — greater mass for smoother, more controlled deceleration and return
  • Adjustable spring tension — trim at 0.25 lbs per coil, up to 12 coils maximum
  • Drop-in replacement — no gunsmithing, no modification to lower or buffer tube
  • Lifetime warranty
  • 100% USA made

H2 vs H3 — Which SMB Do You Need?

SMB Gen3 H2 SMB Gen3 H3 (This Product)
Equivalent Weight 4.7 oz 5.6 oz
FRT Threshold Minimum viable Recommended
Suppressed Builds Marginal Yes — recommended
Short Gas / Sub-16" May need tuning Recommended
Standard Carbine 16" Works well Works well — more margin
Price $59.99 $59.99
Not sure which to choose? Go H3. At the same price, more buffer weight gives you more margin for reliable forced reset trigger function — especially as your round count climbs and component wear starts to affect timing. The H3 is the safer long-term choice for any FRT or Super Safety build.

Why Silent Matters on a Forced Reset Trigger Build

A standard buffer spring scrapes against the inner wall of the buffer tube every time the BCG cycles. On a forced reset trigger or Super Safety build — where cycling rates are significantly higher than standard semi-auto fire — that friction compounds. More cycles per second means more heat, more noise, and faster spring fatigue.

The SMB Gen3 eliminates spring-to-tube contact entirely. The polymer guide rod centers the spring throughout the cycling stroke, front and back, keeping metal off metal. The result is quieter operation, less heat in the tube, and a spring that maintains consistent tension through higher round counts — which means more consistent timing for your forced reset trigger reset cycle.

At $59.99 with a lifetime warranty, the H3 SMB Gen3 is the best value heavy buffer available for any forced reset trigger or Super Safety build on an AR-15 platform.

Installation

  • Insert polymer base with guide rod into the buffer tube
  • Insert the spring onto the guide rod
  • Insert the buffer over the spring

No tools required. Drop-in replacement for any standard AR-15 carbine buffer tube setup.

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- weight is only 58 grams, under 3oz

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-This is the ONLY USA made gun smithing tool, gun cleaning tool, building tool, disable tool on the market.