Firearm

A firearm is a weapon which uses combustion to propel a projectile to a target. The word gun is sometimes synonymous with firearm, though it is sometimes used in the narrower sense of a hand-carried firearm. Firearms also include most artillery. Rocket launchers are sometimes considered firearms, and sometimes considered a separate category of weapon.

The projectile fired by a firearm can be a solid shot, multiple shots (as in a shotgun shell), or an explosive projectile.