The New Frontier Armory NEW FRONTIER BOLT CARRIER AR15 delivers rugged reliability for AR-15 platforms with a precision-built steel composition and MILSPEC-grade assembly that ensures consistent cycling under demanding conditions. Crafted with a high-strength 8620 steel carrier and a 9310 steel bolt, complemented by a 4130 steel gas key that is properly staked, this bolt carrier group is designed to withstand the rigors of high-volume shooting and rigorous field use. The salt bath nitride finish provides enhanced corrosion resistance and a sleek, matte black appearance, while forward assist serrations contribute to smooth, confident operation. Shot peened, MPI, and HPT treatments further elevate surface hardness and reliability, helping to resist wear and maintain tolerances across thousands of rounds. This complete bolt carrier group is tailored for AR platforms and combines steel construction, precise fit, and enduring performance with a lifetime warranty, making it a dependable upgrade for shooters seeking consistent chamber unlocking and dependable function from their Rifle Bolts & Bolt Carrier Groups lineup.