Coating: Manganese Phosphate, chrome lined inside bolt area and gas key
Bolt carrier material: 8620 steel
Bolt: Right-Handed Bolt assembly; made of Mil-Spec Shot Peened Carpenter 158 which offers the best case hardening known for parts subject to heavy shock and wear
Included parts: Bolt carrier, bolt assembly, cam pin, firing pin, and firing pin retaining pin
Staking: Proper mil-spec staking of the gas key In stock!