The RISE Armament RA-1012 AR-10 .308 Black Nitride Bolt Carrier Group is a precision-engineered component designed to enhance the performance of your AR-10 rifle. Featuring a high-strength and easy-to-clean black nitride finish, this bolt carrier group is compatible with .308 and 6.5 Creedmoor calibers. The bolt is made from 9310 steel and MPI tested for reliability, while the carrier is crafted from 8620 tool steel and heat-treated for durability. The gas key is secured with grade 8 hardened fasteners and properly staked. With its robust construction and advanced features, the RISE Armament AR-10 Bolt Carrier Group ensures high-level performance and reliability. RISE Armament RA-1012 AR-10 .308 Black Nitride Bolt Carrier Group RA-1012-BLK