F-1 Firearms DuraBolt Bolt Carrier Group Assembly .223Remington/556 NATO Notride Finish Gold Fits AR-15

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

TiN Coated Finish, Gold

Carpenter 158 bolt that is ground after heat treat

8620 Steel Construction

Product Description

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.