Add to cart 1395 full auto cobray m 11 9 this manual demonstrates a new method of converting the semi auto m 11 9 to full auto capability all modifications are easy. Sallys spa free download. When Cobray purchased the rights to the MAC design, they developed an M-10 in.45 ACP, an M-11 in.380, which was produced as both a machine gun and pistol, an M11/9 in 9mm, and an M12 in.380 ACP. M11/9 is the correct nomenclature for this handgun, but MAC 11 just sounds better in a lyric.