LWRC H3 Carbine Buffer L03-0032A03
Product Description
The LWRC H3 Carbine Buffer (L03-0032A03) is a heavy-duty recoil management component engineered specifically for short-barreled rifles (SBRs), suppressed AR-15 carbines, and over-gassed direct-impingement or piston-driven platforms. Weighing in at approximately 5.4 ounces, this heavy H3 buffer slows down bolt carrier velocity, increases lockup dwell time, and smooths out the overall cycling impulse to eliminate bolt bounce and reduce felt recoil.
Precision-machined from high-grade aluminum with dense internal tungsten weights, the L03-0032A03 features a durable hardcoat anodized finish that resists corrosion, surface wear, and heat buildup inside the receiver extension. The durable rubber bumper at the rear acts as an impact cushion, preventing harsh metal-on-metal contact against the back of the buffer tube during high-volume or fully automatic firing sequences.
Ideal for shooters tuning short-barreled setups (10.5"–12.5"), running high-backpressure sound suppressors, or upgrading factory carbine buffer assemblies, the LWRCI H3 Buffer ensures positive cartridge feeding and extraction reliability. Engineered to strict military specifications, it slides directly into standard mil-spec carbine-length receiver extensions for a drop-in performance upgrade.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits standard mil-spec and commercial-spec carbine-length buffer tubes (receiver extensions) on AR-15 and AR-10/308 carbines. Optimized for suppressed setups, SBRs, and over-gassed gas systems.
- Perform a complete firearm safety check: drop the magazine, pull the charging handle rearward, and visually inspect the chamber to ensure zero live rounds are present.
- Depress the rear takedown pin and pivot the upper receiver open (or separate upper and lower receivers).
- Depress the buffer retainer pin inside the lower receiver and carefully remove the existing buffer and carbine recoil spring.
- Inspect the inside of the buffer tube for dirt, debris, or excessive metal shaving buildup and wipe clean with a dry patch.
- Slide the carbine recoil spring onto the shaft of the LWRC H3 buffer, apply a light film of gun oil to the buffer body, and press the assembly into the buffer tube until the retainer pin snaps up to lock it in place.
- Reassemble the receivers and perform a manual rack and function check to verify proper bolt travel and lock-back on an empty magazine.
Key Features
- Heavy H3 Mass (Approx. 5.4 oz): Increases dwell time and reduces bolt carrier speed for smoother extraction and reduced felt recoil.
- Ideal for Suppressed & SBR Builds: Prevents premature bolt unlocking and violent cycling under high backpressure conditions.
- High-Grade Aluminum Chassis: Precision CNC-machined body with internal tungsten counterweights for dense recoil dampening.
- Anodized Protective Coating: Hardcoat surface finish minimizes friction and wear inside the buffer tube.
- Durable Rubber Rear Bumper: Absorbs rearward kinetic impact to protect lower receiver components.
- Drop-In Mil-Spec Fitment: Compatible with all standard carbine-length receiver extensions and carbine action springs.
Product Specifications
- Brand: LWRC International (LWRCI)
- Model/Series: H3 Carbine Recoil Buffer
- MPN / SKU: L03-0032A03
- Buffer Type: H3 Heavy Buffer
- Weight: Approx. 5.4 oz
- Platform Fitment: AR-15 / M4 / AR-10 (Carbine Receiver Extensions)
- Body Material: Aluminum with Internal Tungsten Weights
- Finish / Color: Anodized Silver
- Country of Origin: USA
