Revolver
pulling the trigger turns the cylinder, positioning a cartridge before the barrel, then cocks and realeses the hammer.
Semiautomatic
these are quicker to fire amd load than revolvers: a quick change mag. in grip holds up to 30 cartriges.
Submachine gun
assault rifle and SMG can switch between automatic and semiautomatic fire. rifles have larger ammo
Hunting Rifle
these have a hand-operated lever or slide to eject the cartridge after firing and load a fresh on into the chamber.
Shotgun
A shotgun fires a handful of small lead pellets that spread, rather than a single bullet. this reduces the need to aim.