Guntec USA AR-10/LR-308 A2 Rifle Buffer .308 Cal 5.5oz

The Guntec USA AR-10/LR-308 A2 Rifle Buffer is a .308 caliber weighted buffer built for the AR-10 and LR-308 rifle platforms. Machined in the A2 rifle-length profile, this buffer drops directly into a mil-spec or A2-style .308 buffer tube and is engineered to cycle the bolt carrier group reliably when running 7.62x51 NATO and .308 Winchester ammunition.

The buffer features a steel and aluminum construction with a weighted internal system. At 5.5 oz, it sits in the standard A2 weight range for the AR-10/LR-308, supplying the mass needed to manage the heavier recoil and longer bolt travel of the .308 action compared to a standard 5.56mm AR-15 build. The black finish is durable for routine service use; color may vary slightly between production runs.

Designed as a direct replacement or build-spec component for any AR-10 or LR-308 pattern rifle chambered in .308, this buffer is a straightforward upgrade or service part. Pair with a matching rifle-length .308 buffer spring (sold separately) for a complete cycling setup.