LEGO minifigure compatible custom Sidan Toys M1917 or M1919 Browning Machine Gun. option to build either. The M1917 Browning machine gun is a heavy machine gun used by the United States armed forces in World War I, World War II, and the Korean War; it has also been used by other nations. It was a crew-served, belt-fed, water-cooled machine gun that served alongside the much lighter air-cooled Browning M1919. Build either one. Contains 5 pieces.