Luth-AR 308-CS-10A AR-10 .308 Carbine Buffer Spring - 9.75" Steel

The Luth-AR 308-CS-10A is a carbine-length buffer spring purpose-built for the AR-10 platform chambered in .308 Winchester / 7.62x51mm NATO. Designed to be paired with a standard carbine buffer tube, this spring delivers the correct spring rate and length needed to reliably cycle the larger bolt and heavier buffer mass of a .308 AR build.

Manufactured from tempered spring steel, the 308-CS-10A measures 9.75 inches overall with a .075-inch wire diameter and 24-25 coils. The geometry is matched to the deeper carbine buffer tube used on AR-10 rifles - standard AR-15 springs are typically too strong and too long for proper function in a .308 carbine, making this Luth-AR spring the correct drop-in solution.

Whether you are completing a new AR-10 carbine build or replacing a worn-out spring in an existing rifle, the Luth-AR 308-CS-10A provides the durable, correctly-spec'd component your .308 AR needs for reliable cycling.