M1911 is a kind of. 45 caliber semi-automatic pistol produced in 1911. It was designed by American John browning.It became the standard pistol of the US Army immediately after its launch and has been maintained for 74 years (1911-1985).M1911 was once a common weapon used by the U.S. Army on the battlefield. It has experienced the first World War, the Second World War, the Korean War, the Vietnam War and the Persian Gulf War.
In 1940, the U.S. military officially named M1911 as "automatic piston, caliber. 45, M1911", and the improved m1911a1 introduced in 1924 was named "automatic piston, caliber. 45, m1911a1", and the m1911a1 during the Vietnam War was renamed "pistol, caliber. 45, automatic, m1911a1". During the whole service period, the United States produced about 2.7 million pieces. M1911 and m1911a1 (excluding allied authorized production) are likely to be the largest cumulative production of automatic pistols in history. M1911 series is a famous product designed by John browning based on the principle of short stroke recoil. Its various characteristics also influence other pistols launched in the 20th century.