 Many weapons have been renamed due to the fact the the original names were   trademarked, and permission was obviously not obtained originally (or   Rockstar Games chose to avoid having to pay any more royalty fees to the   individual gun manufacturers). The Colt .45 is now the Pistol, the Python is   now the .357, the Spaz Shotgun is now the S.P.A.S. 12, the Ingram Mac 10 is   now the Mac, the Uzi 9mm is now the Uz