The Inside Of A Frag And Practice Grenade
How does a grenade work?
Operating the hand grenade is a relatively simple task as there are few moving parts.
The operator uses one hand to hold the safety lever firmly against the grenade body, whilst the other hand is used to remove the safety pin. Providing the operator does not release the safety lever the grenade will not explode.
Once the operator has thrown the grenade, the safety lever will be released, and the striker spring will rotate the striker, until it impacts upon the primer.
The primer ignites a chemical delay fuse, which will burn for approximately four seconds. The delay burns until it reaches the detonator, at which point the detonator will explode and cause an even larger explosion as it ignites the charge.
The contents explode, fragmenting the outer casing (which holds all the explosive inside). These fragments then move outward as shrapnel, damaging the surroundings.