The U.S. Rifle, Cal. .30, M1 saw more production and use by the United States military than many other firearms. The M1 Garand was adopted in 1936 and was largely used until production was ceased in 1957. Over five million of these rifles were made and used throughout this time, especially in World War II. Numerous modifications were made over the years in order to correct issues such as a faulty gas system and updated rear sites near the end of the war.