The Colt 1911 is one of the most influential handguns ever built, and the first conflict it saw significant action in was World War I. The weapon served as the primary sidearm of the United States military in the war. The pistol fired the .45 ACP caliber round from a seven round magazine, plus an additional round in the chamber.
The M1911 gained a reputation for reliability and accuracy, even in the muddy trenches of the war where fighting conditions were rather adverse, to say the least. The pistol would later provide the basis for scores of other handguns released after it, including several to the present day. Today, the M1911 pistol in general remains incredibly popular, with scores of manufacturers producing and selling the pistol today.