Description
rToolcraft Black Nitride .308 Bolt Carrier Group | BCGrToolcraft uses the QPQ (Quench Polish Quench) process to augment the standard Nu-Tride processwith the advanced Black Nitriding process. It enhances corrosion resistance due to the expanded secondary polishing procedure, followed by re-oxidation to produce a lustrous black finish as well as case hardening the steel.rFeatures:rr.308 Winchester 7.62 By 51 NATOrFull Auto Capabler9310 MPI and HPT Tested BoltrCase Hardened 8620 Carrierr4130 Gas KeyrGrade 8 Hardware With Proper StakingrGas Key Sealed With Permatex No.3r8740 Hard Chrome Firing PinrBlack Nitride Treated For Reduced Friction And Increased LongevityrProudly Made In The U.S.ArUnconditional Lifetime Warrantyrrr
