With the introduction of the New Agent .45 ACP Pistol, Colt offers 21st century shooters a modern adaptation of the 20th ... light .45 ACP semi-automatic intended for concealed carry and police ...

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 ...

The .45 Automatic Colt Pistol round, also designed by John Browning, was developed in response to the ineffectiveness of the U.S. Army’s then sidearm, the Colt M1892 revolver.

2012: Colt Defense is awarded a $22.5 million, five-year contract to provide the U.S. Marine Corps with the latest .45 caliber pistols that were originally provided to the military in 1911.