The military eventually turned to the Colt M1911 design and its .45 ACP round, both of which were designed by John Moses Browning. The .45 ACP went on to become the standard issue American ...

45 Colt ammo. How the S&W Schofield Led to Colt’s .45 ACP How did the Army solve this problem? Slowly. First the .45 Schofield was tweaked to have the same rim diameter as the .45 Colt. This new ammo, ...

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 ...

45 ACP, underwent a thorough test against what was then the Model 1907 designed by John Browning and produced by Colt. Ultimately, Colt's design won out, receiving the official designation as the ...

Once again, the Colt and S&W M1917 .45 ACP revolvers ably filled a void in America’s small arms arsenal. Even though many of these revolvers had been overhauled in the 1920s and 1930s ...

Headlining the auction was a Colt .45-caliber revolver that descendants of Earp say was carried during his time in Tombstone, Ariz., and possibly used in the shootout at the O.K. Corral.

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 ...