gauge99CMMG Mk9 9mm complete upper. Factory build, includes hand stop, and three lug muzzle device (the original 1/2 x 36 Birdcage flash hider is also included). 8.5 inch barrel. Approximately 750 rounds. The MK9 is the direct blowback from CMMG, not the radial delayed blowback. $450 shipped.
