of about 25 rounds per minute. The Type 89 discharger could also be used with a more powerful impact-detonated shell approaching the power of a light mortar. Weighing approximately , it was known as the Type 89 50 mm shell, and was made in high explosive (HE), incendiary and smoke variants. To fire the shell (which had a nose-mounted impact fuse that detonated on contact), it was dropped base-down inside the tube of the discharger. By setting the Type 89 discharger at a fixed angle of 45 degrees, and varying distance to target by adjusting the size of a variable chamber space inside the discharger mechanism (see also the Granatnik wz. 36), soldiers could adjust fire onto multiple targets at varying ranges while firing the contact-detonated 50 mm shell through a single small clearing in the jungle canopy. The method worked equally well when firing from deep trenches or pits, or between various building obstructions when fighting inside a built-up town or city. With its curved support plate, the Type 89 was designed to be placed on the ground or against a log or trunk at a fixed firing angle of 45 degrees. However, since it used a spring-loaded, lanyard-operated firing pin mechanism, in an emergency it could fire grenades or shells at point targets while braced horizontally against a tree or building. Combat use The Imperial Japanese Army issued three Type 89s per platoon, making it their most widely used infantry fire support weapon. The Type 89 discharger saw service at the Battle of Khalkhin Gol in Manchuria during the Second Sino-Japanese War. During World War II, the weapon was used effectively against the Allied defenders in the Battle of Corregidor in May 1942. It also saw service in Burma and the Pacific islands. Japanese Navy paratroopers carried special containers for the Type 89 clipped to their harnesses to provide fire support right on the landing zone. Allied troops quickly learned to take cover when they heard the weapon's "pop" when launching its grenades or shells, in some cases from more than away. After World War II the Type 89 was used by Indonesian National Army and militias against Dutch forces in the Indonesian National Revolution, with copies of the weapon manufactured in Demakijo, Yogyakarta. Others were used by Communist forces during Chinese Civil War and Korean War. Some were also used by the Việt Minh during First Indochina