War and by the Viet Cong during the Vietnam War. Ammunition Type 89 50 mm HE (high explosive) mortar shell (fitted with impact detonator) [Weight: ~2.00 lb (0.91 kg)] Type 91 fragmentation grenade (fitted with 7 second delay time fuse, ignited in flight) Type 94 50 mm practice shell Smoke shell weight: 0.9 kg containing 0.11 kg of HC type smoke mixture Incendiary shell weight: 0.57 kg containing 0.32 kg of incendiary material Users : Imperial Japanese Army : Indonesian National Army Notes References Leo J. Daugherty III, Fighting Techniques of a Japanese Infantryman 1941–1945, Gordon L Rottman, Japanese Infantryman 1937-45 Sword of the empire, US Army field manual TM-E 30-480 at hyperwar Taki (Type 89) U.S. World War II Intel Report on Japanese Smoke Grenades See also Chinese Type 27 Commando mortar, a class of infantry light mortars designed for maximum portability and rapid deployment, at the expense of accuracy and rate of fire. Lance-grenade individuel Mle F1 (LGI Mle F1), a French close-support weapon infantry weapon designed to be used by one man External links Nambu World: Type 89 “Knee Mortar” (Grenade Launcher) Type 91 grenade at inert-ord.net Type 89 grenade at inert-ord.net Colour pictures of the Type 89 and Type 10 at carbinesforcollectors.com 89 89 Infantry mortars of Japan 50 mm artillery Military equipment introduced in the 1920s