Luth Ar 308 Rfl/fxd Bfr Tube Assy

The Luth-AR .308 Rifle Fixed Buffer Tube Assembly is a complete drop-in kit engineered for AR-10 platforms built to A2 specifications. This assembly delivers the recoil management and reliability critical to .308 Winchester rifle operation, combining a rifle-length buffer tube, matched recoil spring, and buffer body in a single verified package. Operators and precision rifle builders choose this assembly for its straightforward installation and predictable performance across diverse .308 platforms.

The kit includes a standard A2 rifle-length buttstock extension tube, a .308-specific recoil buffer, and a rifle-grade recoil spring tuned for the heavier bolt carrier and spring weights of 7.62×51 NATO/.308 Winchester ammunition. This configuration absorbs the increased recoil impulse of the larger cartridge while maintaining consistent cycling velocity. The assembly pairs with A2 fixed buttstocks and is designed to work within standard AR-10 receiver extension threads, eliminating compatibility guesswork. At 0.75 lbs, the complete assembly adds minimal weight to your platform while ensuring repeatable performance across range sessions and field applications.

This buffer tube assembly is purpose-built for operators and builders who require proven, mil-spec-adjacent recoil control on .308 AR-10 rifles. Whether configured for precision shooting, patrol-ready carbine duty, or dedicated range training, the fixed stock setup eliminates the variability introduced by adjustable mechanisms while the matched spring-buffer pairing keeps bolt velocity stable across temperature and ammunition variations. The complete kit approach saves time during assembly and ensures all components are engineered to work together from the factory.