Shop › CMMG UPPR RSLT MK4 350LEG 16.1" BLK CMMG UPPR RSLT MK4 350LEG 16.1" BLK $899.95 CMMG Resolute MK4, Upper Receiver, 350 Legend, 16.1" Barrel, Cerakote Finish, Armor Black 35B5FBC-AB Quantity: Add To Cart Added! CMMG Resolute MK4, Upper Receiver, 350 Legend, 16.1" Barrel, Cerakote Finish, Armor Black 35B5FBC-AB