USA. Arizona state. Phoenix. A graffiti on an art school’s wall of a hand with two fingers pointed like when a man shoots a gun. A firearm is a portable gun, being a barreled weapon that launches one or more projectiles often driven by the action of an explosive force. Most modern firearms have rifled barrels to impart spin to the projectile for improved flight stability. The word firearms usually is used in a sense restricted to small arms (weapons that can be carried by a single... more »