Type 2 rifle grenade launcher
The Type 2 rifle grenade launcher was an attachment for the Japanese Type 38 and Type 99 rifles that allowed them to fire special hollow charge grenades. It was a version of the German Schiessbecher grenade launcher. Two grenades were produced for the launcher: a 30 mm calibre grenade and a larger 40 mm calibre grenade, both designated Type 2. The launcher sits over the end of the barrel, held in place with a clamping device. A special crimped blank cartridge or wooden bullet is used to fire the grenades.
The rear of the grenades is pre-rifled to mate with the rifling in the launcher. The rifling ensures that the grenade is spun in flight, giving it stability and arming the rotational fuze. Both grenades use a largely identical fuze, which makes up the rear part of the grenade. On impact, momentum carries the striker assembly forward, overcoming the resistant force of a creep spring into the detonator.
|30 mm grenade||40 mm grenade|
|Length||6.4 inches||7.1 inches|
|3.8 inches||4.2 inches|
|1.2 inches||1.6 inches|
|Weight||8.1 ounces||13 ounces|
|Explosive content||1.76 ounces||3.5 ounces|
|Explosive type||50% TNT / 50% RDX|
|Armor penetration||-||3.88 inches of mild steel|
- TM-E 30-480, Handbook on Japanese Military Forces. United States War Department.