The CMMG MK3 Bolt Carrier Group is a complete bolt carrier assembly designed for AR-style rifles chambered in .308 / 7.62 NATO, constructed from steel and finished in black phosphate, with a chrome-lined carrier for added surface protection. The assembly includes a 9310 steel bolt and an S7 tool steel extractor, configured for direct installation in compatible AR .308 platforms.
This complete .308 Mk3 bolt carrier group includes a complete bolt, properly staked gas key, firing pin, cam pin and firing pin retaining pin. Built with serviceable materials and manufacturer-standard dimensions, the CMMG MK3 BCG is a practical option for those restoring or assembling AR .308 platforms. Its combination of steel components, chrome-lined carrier, and protective phosphate finishes delivers a straightforward, durable solution for routine use and installation in compatible systems.
