F-1 Firearms Durabolt Bolt Carrier Group Assembly .223 Remington/556NATO Chrome Nitride Finish Silver

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



CRN Coated, Silver

Carpenter 158 bolt that is ground after heat treat

8620 Steel Construction



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.