A CMMG MK47 is a semi-automatic rifle chambered in 7.62x39mm, designed by CMMG that uniquely combines features of an AR-15 with an AK-47, allowing it to use standard AK-style magazines while utilizing AR-15 style controls and a direct impingement gas system, essentially creating a hybrid platform with a familiar feel for AR users but the ability to feed from AK magazines; often referred to as the "Mk47 Mutant" due to its blended design.