Simplify the following text for a Grade 20 native English-speaking person.
Original: The subject of ammunition is a complex one which covers application of fire to targets , general use of weapons by personnel , explosives and propellants , cartridge systems , high explosive projectiles ( HE ) , warheads , shaped charge forms of attack on armor and aircraft , carrier projectiles , fuzes , mortar ammunition , small arms ammunition , grenades , mines , pyrotechnics , improved conventional munitions , and terminally guided munition .
Simplified: It covers use of fire to a hit target , use of weapons by people , explosives and propellants , cartridges , high explosive projectiles ( HE ) , warheads , special shells to attack armor and aircraft , carrier projectiles , fuses , mortar ammunition , small arms ( revolver and pistol ) ammunition , grenades , mines , flares , improved conventional munitions , and computer guided munition .