In 1941 the US Military began looking for an alternative for the Thompson submachine guns. In December of 1942 they adopted a new submachine gun, the M3. Built from an all steel construction using ...

recommending they use the bolt-action Springfield 1903 instead. The M3 submachine gun, or “Grease Gun,” as it was commonly known, was developed by General Motors and introduced in 1944 as a ...