CMMG

This 8 BANSHEE upper group is what's needed for the ultimate 9mm AR. Not only does this 9mm upper utilize CMMGs RDB technology, but shooters also have a number of lower/magazine pairing options. CMMG 9mm uppers work with standard AR15/Mk4 lowers and 9 AR Conversion Mags as well as a number of pistol magazine lowers: Mk9 (Colt-pattern mags), MkGs (Glock-pattern mags), Mk17 (Sig P320 mags). All CMMG Upper Groups come complete with bolt carrier group and ZEROED accessories