Original Item. Only One Available. The Type 100 grenade discharger (一〇〇式擲弾器) was introduced in 1939 as a grenade launcher for the Type 38 and Type 99 Arisaka rifles. The Type 100 launches standard Type 91 and Type 99 hand-grenades. The launcher is somewhat unusual in that rather than using the more common cup designs it is a gas trap system, meaning that it incorporates a barrel extension which taps off excess propellant gases to launch the grenade from a cup offset from the barrel. This has the advantage that standard rifle cartridges could be used along with the standard hand-grenades which simplified logistics, at the expense of increased weight and decreased efficiency. Like all deactivated ordnance, this launcher is Not Available for Export.

There were two types of the Type 100 Grenade launcher. This is the example meant for the 7.7mm Model 99 (1939) rifle. 

This is an outstanding example of a Type 100 Grenade Discharger, the first we have ever offered. The launcher is in great service-used condition with oxidation overtaking much of the original finish, with the barrel retaining the most finish. 

The side of the launcher is stamped:

34112
四 十 (Arsenal Markings)

34112 is the serial number. The two markings next to the arsenal markings denote SHOWA (current reigning emperor) Juu-Roku Nen (14th year of reign - 1939). Along the mount is the designation, 100 for Type 100. 

The launcher retains the metal cartridge insert on the original chain, though the chains are very oxidized. 

This is an excellent example in good service-used condition. It was likely brought back by an American soldier.

Ready for display!

It should be noted that the launchers are attached only when bayonets have been fixed. First, the locking clamp is attached to the muzzle of the rifle or carbine. A Model 100 launcher is then slid over the locking clamp, with the cup upward and the bullet-escape tube in front of the rifle muzzle. When the launcher is in place, the spring clamp holds it to the rifle. The locking pin is pushed in so that it passes behind the rear of the bayonet handguard, and automatically locks the launcher in place. The cleaning rod need not be removed.

To fire, the butt of the rifle is placed on the ground after a live round of ball ammunition has been placed in the chamber of the rifle and a grenade loaded. The grenade itself is placed cap downward in the tube after the safety pin through the cap has been removed. Since the fuze of the grenade takes only a short time to burn, the barrel must not be elevated more than 40 degrees in the case of rifles, or 30 degrees in the case of the 6.6-mm Model 38 carbine. Greater elevation will result in an air burst. When the rifle is fired, the bullet passes out the muzzle into the escape tube. While the bullet is passing through the escape tube, gas from the cartridge flows up into the grenade discharger cup and expels the grenade.

Totally inert, cannot be converted to an explosive device, not available for export. This item is completely legal within the USA. International Military Antiques, Inc observes all Federal, State and Local laws. Everything for sale on ima-usa.com is completely legal to own, trade, transport and sell within the United States of America.

All deactivated ordnance sold by IMA, Inc is engineered to be inoperable according to guidelines provided by the US Bureau of Alcohol, Tobacco, Firearms and Explosives (BATF).