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 ...