For those of you who aren’t familiar with the legendary M1911 single-action semiautomatic pistol and its .45 ACP (Automatic Colt Pistol) cartridge, it became the U.S. Armed Forces’ standard ...

The .45 Automatic Colt Pistol round, or .45 ACP as it is commonly known, is fairly controversial. Invented in 1905 by prolific firearms designer John Moses Browning, the .45 ACP was the standard ...