The Colt M1911 is a semi-automatic pistol designed by John Browning and adopted by the United States Army in 1911. It is chambered for the .45 ACP cartridge and features a single-action mechanism, which means the hammer must be cocked manually for the first shot. The M1911 has a reputation for reliability and stopping power, making it a popular choice among military, law enforcement, and civilian shooters. Over the years, the M1911 has undergone various modifications and has inspired numerous clones and variants. Its design includes a 7-round magazine and a distinctive grip safety, which prevents accidental discharge. The pistol remains a significant part of firearms history and is still in use today.