AR 15 H2 Carbine Buffer

The AR-15 H2 Carbine Buffer from Rare Breed Triggers adds precisely calibrated mass to your buffer system, smoothing out cycling issues common in carbine-length gas systems and heavier calibers. This isn’t a generic upgrade—it’s a calculated solution for suppressed rifles, SBRs, and overgassed builds that need weight without compromising speed.

What you get

• H2 buffer weight (4.6 oz total mass) with steel/tungsten internal weights
• Aircraft-grade 7075 aluminum body with Type III hardcoat anodizing
• Reduces bolt bounce and carrier tilt in carbine-length systems
• Optimized for .300 Blackout, 5.56 NATO, and other intermediate cartridges
• Improves reliability with suppressors and short-barreled configurations

Build and finish

The buffer’s 7075-T6 aluminum construction matches the material spec used in AR-15 receivers, with a black anodized finish that withstands carrier impact better than standard commercial buffers. Rare Breed uses a proprietary weight configuration—two steel and one tungsten slug—to hit the 4.6 oz sweet spot between standard carbine (3.0 oz) and H3 (5.4 oz) buffers.

Unlike budget buffers with loose weight tolerances, this unit maintains tight dimensional specs (±0.001″ on critical surfaces) to prevent binding in the buffer tube. The internal weights are permanently staked, not just pressed in, eliminating the rattle found in cheaper alternatives. The result is a buffer that handles the sharp impulse of short-stroke gas systems without degrading over time.

Compatible platforms

• AR-15/M4 carbines with carbine-length buffer tubes
• Pistol-caliber carbines (9mm, .45 ACP) with standard AR buffers
• Suppressed rifles using adjustable gas blocks
• .300 Blackout builds (subsonic and supersonic loads)
• Not recommended for rifle-length buffer systems or A5 tubes

Installation notes

Swap your existing carbine buffer by removing the rear takedown pin and sliding out the buffer and spring. No tools required beyond a punch for the takedown pin. This H2 buffer works with all standard carbine buffer springs and maintains compatibility with aftermarket triggers.

Ohio Gun Shop stocks this Rare Breed buffer because it solves real cycling issues—not because it’s marketed as a miracle part. Whether you’re tuning a suppressed hunting rig or a home-defense SBR, the added mass makes a measurable difference in felt recoil and bolt carrier behavior. Pair it with our selection of gas tubes and springs for a complete recoil management system.