CMMG Mk47 Upper Receiver Assembly Armor Black. Specifications for CMMG Mk47 Upper Receiver Assembly: Manufacturer: CMMG Caliber: 7.62x39mm Muzzle Device: CMMG Zeroed Muzzle Brake Finish: Cerakote Color: Armor Black Fabric/Material: Billet 7075-T6 Aluminum Gun Type: Rifle Gun Make: CMMG Gun Model: CMMG Resolute Mk47 Magazine Included: No Condition: New Package Contents: CMMG Mk47 Upper Receiver Assembly What firearm models does the manufacturer say CMMG Mk47 Upper Receiver Assembly is compatible with? The manufacturer suggests that CMMG Mk47 Upper Receiver Assembly is compatible with CMMG Resolute Mk47CMMG 76BA274-AB: Mk47 Upper Receiver Assembly Armor Black