This Black Nitride BCG M16 / AR-15 complete bolt carrier group is treated with Black Nitride for enhanced durability, lubricity, and easy cleaning.
Carrier is made from 8620 steel, bolt is made from 9310 steel and is MPI tested, shot peened, and batch HP tested.
The Bolt and Bolt Carrier Assembly comes complete with cam pin, firing pin, and firing pin retainer. This bolt carrier group will work with any mil-spec AR-15. Bolt is marked MPI.