Gun | Firearm, Ammunition, Self-Defense | Britannica
https://www.britannica.com/technology/gun-weapon
WebNov 30, 2023 · Gun, weapon consisting essentially of a metal tube from which a missile or projectile is shot by the force of exploding gunpowder or some other propellant. In military science, the term is often limited to cannon larger than a howitzer or mortar, although these latter two types, like all tube-fired.
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