New Frontier Armory Bolt Carrier AR15 8620 9310 Salt Bath Nitride MPI

The New Frontier Armory NEW FRONTIER BOLT CARRIER AR15 delivers reliable performance for AR-15 builders and enthusiasts, featuring a 8620 steel carrier paired with a 4130 steel gas key and a 9310 steel bolt for durable, precision-ready operation. The gas key is properly staked to MILSPEC, and the assembly benefits from a Salt Bath Nitride finish for improved wear resistance and corrosion protection, while forward assist serrations add practical utility during field maintenance. Each component is shot peened, MPI tested, and HPT inspected to ensure consistent hardness and strength, backed by a lifetime warranty for lasting confidence. This complete bolt carrier group is designed for AR compatibility and comes in a Black Matte finish with dimensions of 1.05 x 3.85 x 7.80, making it a versatile upgrade for rifle builds or to refresh a worn BCG. Built to meet high standards of reliability and performance, it's an ideal choice for those seeking a robust, ready-to-install bolt carrier group that supports smooth cycling, consistent timing, and long-term service in demanding shooting scenarios.