The 1911 pistol is a semi-automatic handgun designed by John Browning and first produced in 1911. It is chambered primarily for the .45 ACP cartridge and features a single-action mechanism. Known for its reliability and accuracy, the 1911 has been widely used by military, law enforcement, and civilian shooters. The design of the 1911 includes a steel frame and a 7 to 10 round magazine, depending on the variant. Its popularity has led to numerous adaptations and customizations, making it a favorite among firearms enthusiasts. The 1911 remains a significant part of firearm history and culture.