The M2 was developed by the United States and used by the Marine Corps and Army. The M2 was a new derivative of the M1 Flamethrower. Capable of shooting for seven seconds straight and a range of over 20 meters, it could be an effective weapon. Although it had drawbacks such as its heavy weight of over 30 kilograms empty and its explosive tendency if shot. It was used greatly in the Pacific Theater and although to a lesser extent, in the European theater. Furthermore, when used on the battlefield, the operator of the device instantly became a target. The M2 never had any variants of itself produced during World War II, though later in the Vietnam War, the M2A1-7 was created which fundamentally served as a modernization to the original model.