The Colt 1911 is a semi-automatic pistol designed by John Browning and first produced in 1911. It is chambered primarily for the .45 ACP cartridge and features a single-action mechanism. The design has become iconic, known for its reliability and stopping power, making it a popular choice among military, law enforcement, and civilian shooters. The Colt 1911 served as the standard-issue sidearm for the United States Armed Forces from 1911 until 1985. Its robust construction and ease of use have led to numerous variants and adaptations over the years, maintaining its status as a classic firearm in both historical and modern contexts.