One of the longest-standing American classics, the .45 ACP, has been a legend since Colt introduced the M1911 in 1911 as the standard sidearm for the U.S. military from World War I to Vietnam. But in ...
Developed shortly before the first world war, the .45 ACP rapidly became one of the most popular pistol cartridges in the world. It was the longest serving sidearm cartridge the United States has ever ...