Description: This grenade is a copy of the German Gross Gewehr Panzergranate and is fired from a cup launcher attached to the standard 6.5 mm rifle.

The body is cylindrical with a semiconical shaped head. It is made in two parts threaded together and fitted with a ballistic cap and cone to give the hollow-charge effect. The forward part contains the explosive charge cast around the cone. The after part which is made of aluminum has a rifled collar near the base and contains the fuze and explosive train.

The fuze is held in by a base plate with a protruding spigot which is screwed into the base of the grenade. The fuze is held in position by the spigot. The needle firing pin is secured in a housing that has four stirrup-like spring protruding from the side. Around the hosuing is a setback spring held in by an arming sleeve which has two sets of grooves notched on the inner side. Holding the firing pin stationary is a coil clock spring which is held in by the arming sleeve. There is also a creep spring between the firing pin and de-tonator.

The propelling charge consists of a special cartridge with a wooden bullet.

Operation: On firing, setback causes the arming sleeve to move down and it is held down by the stirrup springs which engages in the groove in the arming sleeve. Centrifugal force then causes the clock spring to expand and the fuze is armed. On impact the firing pin housing overcomes the creep spring and moves onto the flash cap setting off the de-tonator and booster.

Description: The explosive head of the 30-mm grenade is of the same type construction as that of the 40-mm, but on a smaller scale. The spigots of the 30- and 40-mm grena-des are identical with the exception of the threads on their forward ends. Both grenades use the same fuze.

Operation: The operation of the 30-mm hollow-charge rifle grenade is identical to that of the 40-mm size.

Figure 182 – Hollow-Charge Rifle Grenades.