Automatic Colt Pistol (ACP)

Automatic Colt Pistol (ACP):

Automatic Colt Pistol (ACP) refers to specific calibers originally designed by John Moses Browning for the Colt Firearms Company. Automatic Colt Pistol (ACP) ammunition includes 25 ACP, 32 ACP, 38 ACP, 380 ACP, and 45 ACP.