In Grenade No. 20 releasing collar slips back on the rifle being fired.
In Grenade No. 5, Mark I. On this grenade being thrown the pressure of the fingers being released the striking lever flies outward by the pressure of the powerful spring, releasing the shoulder of the firing striker which is driven on to the fuse and explodes in 4½ seconds.
All other grenades, see pages opposite plates.
THROWING
Hand grenades are held firmly in the hand behind the thrower, the arm is brought quickly upward with a sweeping movement (the arm straight all the time), the grenade will be let go when the hand is above the thrower’s head, and should describe a semicircle in its flight.
Hand grenades can be thrown from 30 to 50 yards, rifle grenades from 200 to 400 yards.
Attacks should be practiced with dummy and deteriorated grenades, i.e., grenades with only a detonator and no explosive, etc.
Confidence and knowledge of grenades should be gained by students handling, stripping and assembling all types and handling fuses and detonators, as often as possible.