The Mk47 K is the shorter 10? barreled version of the Mk47 uppers. The Mk47 K features CMMG’s mid-sized receiver based on our Mk3 platform, carved from billet 7075-T6 aluminum. It also features an improved 9? hand guard designed to be compatible with aftermarket muzzle devices and suppressors. The Mk47 was designed to harness the power and reliability of the 7.62x39mm cartridge utilizing a robust bolt based off our Mk3 (.308). Every upper comes equipped with an SV muzzle brake.