In 2015, Ruger expanded its popular Redhawk revolver line to include a dual-caliber big bore option chambered in the cartridge combination of .45 Colt and .45 ACP.

Nobody has done this less than the original maker of the gun, Colt Firearms. With the introduction of the New Agent .45 ACP Pistol, Colt offers shooters of the 21st century a modern adaptation of ...

Sound familiar? If all that nonsense hadn’t happened in the 1870s with the Colt SAA and the Schofield and the drama over the .45 Colt and the .45 Schofield, we may have never gotten the .45 ACP that ...

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 ...

A Colt .45 revolver once owned by General George S. Patton sold for $75,000 at auction in Los Angeles Thursday. Profiles in History, which conducted the auction, had expected the working firearm ...

Wyatt Earp revolver: The Colt .45 used at the OK Corral shootout in Tombstone, Ariz., by Wyatt Earp was sold at auction for $225,000.

For example, in 1877 Colt introduced a new gun called Frontier (pictured at the top), which was a Single Action Army chambered in the Winchester Repeating Arms Company's .44-40 centerfire cartridge.