XTS Heavy Buffer 4 5 oz Fits Mil Spec AR 15 Buffer Tubes Black BUFFER HW UPC 767820090795
Product Description
The XTS® Heavy Buffer 4.5 oz (SKU: BUFFER-HW / UPC: 767820090795) delivers an immediate, cost-effective mechanical upgrade to optimize cyclic action and tame harsh recoil in direct-impingement and piston AR-15 platforms. Weighing in at approximately 4.5 to 4.7 ounces, this heavy buffer provides the additional reciprocating inertial mass necessary to delay chamber unlocking, dramatically soften the rearward stroke, and eliminate bolt carrier bounce during aggressive cycling schedules.
Precision-machined from solid carbon steel, the BUFFER-HW is built to withstand relentless battering in demanding operating environments. The steel exterior is treated with a protective black oxide finish that prevents oxidation and reduces friction inside the receiver extension. Fitted with an ultra-durable polyurethane rear impact bumper held firmly in place by a heavy-duty cross roll pin, this buffer effectively dampens the metal-on-metal shock transferred to your lower receiver extension during full cyclic compression.
Whether you are tuning an overgassed 16-inch carbine-gas rifle, running a dedicated sound suppressor, or fine-tuning a short-barreled rifle (SBR) / AR pistol build, the XTS Heavy Buffer provides reliable dwell time extension. The increased reciprocating weight keeps the cartridge case sealed in the chamber microseconds longer, dropping internal chamber pressures prior to extraction, significantly reducing case rim shearing, and keeping gas blowback away from the shooter's face.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct drop-in fit for all standard 7.0-inch to 7.25-inch internal depth AR-15 / M4 carbine-length receiver extensions (both Mil-Spec 1.148-inch OD and Commercial 1.168-inch OD tubes). Ideal for 5.56 NATO, .223 Rem, 300 AAC Blackout, and 7.62x39mm carbine builds. CRITICAL: Not compatible with fixed rifle-length (A1/A2) buffer tubes without a drop-in carbine conversion spacer. Not compatible with VLTOR A5 intermediate receiver extensions without an A5-specific spacer. Always inspect buffer retainer pin clearance upon installation; ensure the buffer face rests squarely against the bolt carrier rear without binding against the buffer retainer nipple when the receivers are closed. Lightly coat the buffer body with synthetic gun oil or CLP prior to insertion to prevent tube drag.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically verified empty.
- Push out the rear takedown pin, swing the upper receiver open, and remove the bolt carrier group and charging handle from the upper receiver.
- Depress the spring-loaded buffer retainer pin located at the front mouth of the lower receiver extension, carefully catching and withdrawing the existing buffer and carbine action spring.
- Inspect the interior of the receiver extension for debris, lubricate the exterior body of the XTS BUFFER-HW with a light film of CLP, and slide the heavy buffer onto the forward end of your carbine recoil spring.
- Compress the spring and buffer into the receiver extension until the buffer front collar clears and captures behind the buffer retainer pin, close the upper receiver, re-engage the takedown pin, and hand-cycle the action to verify smooth travel and positive bolt lock.
Key Features
- Enhanced Cyclic Mass (4.5 – 4.7 oz): Delivers tuned reciprocating weight equivalent to an H2/H3 class buffer, extending chamber dwell time and eliminating high-speed bolt bounce.
- Machined Steel Construction: Precision-turned from high-tensile carbon steel to ensure long-term structural integrity under sustained semi-automatic firing schedules.
- Recoil & Gas Mitigation: Slows bolt carrier rearward acceleration, noticeably reducing felt impulse, muzzle climb, and gas blowback on suppressed rifles.
- High-Impact Polyurethane Bumper: Resilient polymer bumper absorbs hard end-of-stroke impact forces, preventing premature receiver extension fatigue.
- Corrosion-Resistant Black Oxide: Durable chemical conversion coating resists rust, ambient moisture, and cleaning solvent degradation.
- Universal Carbine Drop-In Interface: Sized to standard 3.25-inch carbine dimensions for seamless fitment in standard Mil-Spec and Commercial-Spec AR-15 buffer tubes.
Product Specifications
- Brand: XTS® (Xtreme Tactical Sports)
- Model/Series: Heavy Carbine Buffer (4.5 oz)
- MPN / SKU: BUFFER-HW / XTS-BUFFER-HW
- UPC: 767820090795
- Target Weight: 4.5 oz – 4.7 oz (127.6 g – 133.2 g)
- Overall Length: 3.25 Inches (8.26 cm)
- Body Diameter: 0.75 Inches (1.91 cm)
- Material: Precision-Machined High-Tensile Carbon Steel
- Bumper Material: Heavy-Duty Impact-Resistant Polyurethane Polymer
- Surface Treatment: Protective Black Oxide Finish
- Platform Compatibility: AR-15 / M4 Carbine Buffer Tubes (Mil-Spec & Commercial-Spec)
- Country of Origin: Imported / United States
