On impact the needle pellet sets forward against the creep spring, on the detonator cap, firing the grenade.
The steel body is serrated so as to furnish numerous missiles.
Package of Grenades: The wooden box provided carries 20 grenades in protecting tins with screw-off lids, 20 detonators, rifle grenades in four tin boxes with lever lids, and 22 special blank cartridges in a tin box.
Preparation for Firing: The grenade is removed from its tin and the ebonite plug in its head is unscrewed by hand. The grenade is held nose down to make sure that the needle pellet is held by the retaining bolts.
If correct, the detonator is inserted and screwed home.
The rod is then gently lowered into the rifle, the clip sprung on the muzzle and a blank cartridge inserted in the chamber.
The safety pin is withdrawn just before firing.
If, after the safety pin has been removed, the grenade is not used, the safety pin may be replaced if the screwed ring has not unscrewed and uncovered the two retaining bolts, but if these are uncovered the grenade is in a dangerously sensitive condition, and if so found should be destroyed. Only the special detonators and cartridges provided should be used.
If by accident a grenade were fired with a bulleted round the rifle would probably burst and injure firer.
This grenade is very safe to handle, as it cannot be fired by knocking or dropping on the ground; it must travel through the air some distance before the retaining bolts fall out.