.45 ACP

The .45 ACP (Automatic Colt Pistol) .45 ACP (11.43×23mm) is a type of bullet, made to be used in the M1911 pistol used by the U.S. Military.The .45 Auto was the original round for the 1911,was 1mm longer then the .45 ACP, and was first made by John Browning in 1904. It was the standard for handguns in the U.S. military until they switched to the Beretta M9 (Beretta 92) in 1985 that used a smaller caliber 9mm bullet.

The .45 ACP is famous for being the bullet used in the M1911 and for being the choice of the U.S. Military for their pistols for almost 75 years. The .45 ACP has good stopping power due to the large size of the bullet (typically 230 grain), the low pressure casing and the ~850 fps velocity that is not designed to over penetrate, but instead create significant internal damage to targets. 

It was used for guns like the M1911, the Thompson submachine gun  the M3 Grease Gun, the USP45, the UMP45, the TDI Kriss Super V, the MAC-10, and many other guns.

 References 

Category:Weapons
Category:Ammunition