CMMG Lower Group Mk9 Pistol

AR-15 dedicated lower receiver made of forged 7075-T6 aluminum with Type III hard anodized finish. Single Stage mil-spec trigger. A2 pistol grip. Ambidextrous AR-15 safety selector. Knurled pistol tube. Standard carbine spring and 9mm buffer system. Includes feed ramp, ejector and extended bolt catch. Uses Colt SMG style magazine. Standard takedown/pivot pin holes and .155 inche hammer/trigger pin holes.