The Colt M1903 is a semi-automatic pistol designed by John Browning and produced by Colt's Manufacturing Company. Introduced in 1903, it was chambered for the .32 ACP cartridge and became popular for its reliability and compact size. The M1903 was widely used by military and law enforcement agencies, as well as civilians. The pistol features a single-action mechanism and a 7-round magazine. Its design influenced many subsequent firearms, and it remained in production until 1945. The Colt M1903 is recognized for its historical significance and is often collected by firearm enthusiasts today.