A firearm is a weapon that uses gunpowder or other propellants to launch a projectile, typically a bullet. Firearms come in various types, including handguns, rifles, and shotguns, each designed for specific purposes such as self-defense, hunting, or sport shooting. They operate by igniting a charge that propels a projectile through a barrel. Firearms are regulated in many countries to ensure safety and prevent misuse. Laws often dictate who can own a firearm, how they can be used, and the requirements for purchasing one. Related topics include gun safety, firearm legislation, and ammunition.