F-1 Firearms Durabolt .223 Remington/556NATO Bolt Carrier Group Assembly - Gold TiN Finish, Fits AR-15

The F-1 Firearms DuraBolt Black Nitride direct impingement full auto rated M16/M4 bolt carrier group, for use in AR15 platforms, is compatible with MIL-SPEC receivers and associated components. The bolt carrier and bolt are ground after heat treat to ensure tolerances.

• Carpenter 158 bolt, ground after heat treat, MPI and HPT
• 8620 steel carrier, ground after heat treat