CMMG Parts Kit Bolt Carrier Maintenance Mk47 7.62x39mm 76AFFC8. Specifications for CMMG Mk47 7.62x39mm Bolt Carrier Maintenance Kit: Manufacturer: CMMG Cartridge: 7.62x39mm Gun Make: CMMG Package Contents: CMMG Mk47 7.62x39mm Bolt Carrier Maintenance...