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45 Auto / ACP Ammo


The .45 ACP (11.43×23mm) (Automatic Colt Pistol), also known as the .45 Auto by C.I.P. or 45 Auto by SAAMI, is a cartridge designed by John Browning in 1904, for use in his prototype Colt semi-automatic .45 pistol and eventually the M1911 pistol adopted by the United States Army in 1911.

This is our U.S. Military's longest service pistol caliber and one of the best, longest proven defensive chamberings in a concealed carry sidearm.  From every classic and modern production 1911 to H&K's SOCOM Mk23 to the Sig P220 and so many more, the .45 ACP is America's caliber and trusted for personal defense for now well over a century.