Description
Bolt Carrier:Design: Heavy Duty M16Material: 8620 steel, coatedGas key: hardened billet 4140 machined, coatedGas Key Screws: Grade 8 properly staked (heavy strike)Coating: GREY Ion Bond coating
Bolt Subassembly:Material: Carpenter No. 158 Alloy Steel, Shot PeenedMPI: Yes, MPI InspectedExtractor: 4140 Heat Treated & Shot PeenedO-Ring: Mil-Spec materialGas rings (3): MilspecCoating: GREY Ion Bond coating
Cam Pin:Material: 8620 steelCoating: GREY Ion Bond coating
Firing Pin:Material: mil-spec firing pin made from centerless ground 8740 steelCoating: hard chrome
