This AR-STONER LR-308 Barrel is perfect for use in competition or hunting where both accuracy and reliable function are important factors. Chambered in .308 Winchester and manufactured from Chrome Moly Steel, this 1 in 10" twist, lightweight contour barrel gives you high quality at a great value. Additional features include a rifle-length gas port, AR-10 Feed Ramps and 5/8"-24 threaded muzzle. The barrel extension and locator pin are both included and installed at the factory.