Suomi KP/-31

The Suomi KP/-31 (Suomi-konepistooli or "Finland-submachine gun", literally: "Finland Machine-pistol") is a submachine gun (SMG) of Finnish design that was mainly used during World War II. It is a descendant of the M-22 prototype and the KP/-26 production model, which was revealed to the public in 1925. The Suomi-konepistooli KP/-31 is often abbreviated to Suomi KP.