Type 89 Knee Mortar

The Type 89 grenade discharger, commonly known as the knee mortar was a Japanese light infantry weapon introduced in 1929 which blurs the lines between grenade launcher and mortar. Like a mortar, it fires propelled explosive bombs in a highangle indirect fire role, but it has a rifled barrel and uses a range adjustment mechanism very different from most mortars. The knee mortar proved to be a very capable and effective weapon in WWII against US forces. It was accur