thus increases the accuracy of its flight. The projectile is long and inches in diameter; the complete round weighs . The 70mm mortar was also used to launch an unusual AA mine discharger shell. References Bibliography US War Department Special Series No. 19 Japanese Infantry Weapons December 1943 US War Department Special Series No 30 Japanese Mortars and Grenade Dischargers 1945 US War Department TM-E 30-480 Handbook on Japanese Military Forces 1 October 1944 US Navy Bomb Disposal School Japanese Ammunition 1 July 1945 External links http://www3.plala.or.jp/takihome/ World War II infantry weapons of Japan Infantry mortars of Japan 70 mm artillery World War II mortars of Japan Military equipment introduced in the 1920s