Automatic Colt Pistol

A variety of pistol cartridges designed by John Moses Browning that are mainly used in semi-automatic pistols

Automatic Colt Pistol (ACP) is a series of firearms cartridges designed by John Moses Browning, for use in the semi-automatic pistols he designed for Colt and Fabrique Nationale. The five cartridges were introduced between 1899 and 1908.