The SIG P1911 pistol is a semi-automatic pistol produced by SIG Sauer based on the classic M1911 modification, with a variety of calibers such as 9×19mm Parabellum, .45 ACP, and a barrel of 5-inch standard and 4.2-inch compact, 3.3-inch ultra-compact, etc. It retains the classic lines of the M1911 but incorporates modern aesthetics, with optimized ergonomics through G10 grips, textured treatments, and more, and adopts the principle of a short-stroke recoil of the barrel with a single-action trigger for high accuracy, reliability, and the power of firing .45 ACP ammunition. There are a variety of variants such as the Sig Sauer 1911 Emperor Scorpion, which are suitable for military, law enforcement, and civilian collections and shooting entertainment.