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[[Image:Glock30.jpg|right|200px]]

[[Image:Glock30.jpg|right|200px]]

A '''gun''' is a weapon which fires a bullet, dart or other projectile.  It is highly effective to deter crime and to protect the gun owner in self-defense situations.  The police rely on guns to enforce the law, except in some countries where the police are not armed. It is debatable in these countries whether the police can properly protect citizens from gun-wielding criminals, as they must wait for the arrival of specialist firearms officers before being able to act.

A '''gun''' is a weapon which fires a bullet, dart or other projectile.  It is commonly used to either enact crime, deter crime or in self-defense situations.  The police rely on guns to enforce the law, except in some countries where the police are not armed. It is debatable in these countries whether the police can properly protect citizens from gun-wielding criminals, as they must wait for the arrival of specialist firearms officers before being able to act.

The three main types of modern firearms today are bolt-operated, semi-automatic, and automatic weapons. In a bolt-action weapon, each new [[round (ordnance)|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, the gun jams, or runs out of ammunition.

The three main types of modern firearms today are bolt-operated, semi-automatic, and automatic weapons. In a bolt-action weapon, each new [[round (ordnance)|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, the gun jams, or runs out of ammunition.