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'''Guns''' are tools generally designed for firing bullets in a controlled manner.  They have traditionally been used for two purposes: firing bullets at people, and threatening to fire bullets at people.  Thus, a gun is considered a [[weapon]], though technically, the bullet is the weapon, unless the gun itself is used as a club, or as a spear if it has a [[bayonet]] attached.

A '''Gun''' is a piece of [[ordnance]] which fires a bullet, dart or other [[round (ordnance)|round]] (see [[firearms]]).

The three main types of firearms today are bolt-operated, semi-automatic, and automatic weapons. In a bolt-action weapon, each new round must be chambered manually, by moving the breech to eject the empty casing. In semi-automatic weapons, each pull of the trigger fires a bullet. In fully automatic weapons, bullets will be fired as long as the trigger is depressed until either the trigger is released, or the ammunition is exhausted.

The three main types of firearms today are bolt-operated, semi-automatic, and automatic weapons. In a bolt-action weapon, each new round must be chambered manually, by moving the breech to eject the empty casing. In semi-automatic weapons, each pull of the trigger fires a bullet. In fully automatic weapons, bullets will be fired as long as the trigger is depressed until either the trigger is released, or the ammunition is exhausted.