An airsoft gun is a type of low-power smoothbore air gun designed to shoot non-metallic spherical projectiles, often colloquially referred to as BBs, using air pressure. Airsoft guns are realistic-looking replica/toy guns that imitate real firearms and come in all shapes and sizes, appreciated by collectors, firearm aficionados, and hobbyists alike. They are designed to be safely fired at other people for games and are non-lethal, similar to paintball guns. Airsoft guns can be categorized into two groups based on the design mechanism for pellet propulsion: mechanical and pneumatic. Mechanical airsoft guns consist of a coil spring-loaded piston air pump that is either manually cocked or automatically cycled by a battery-powered electric motor gearbox, while pneumatic airsoft guns operate by valve-controlled release of prefilled bottled gas such as compressed propane mixed with silicone oil or CO2 canisters. Airsoft guns are often designed to realistically resemble actual guns, making it difficult to distinguish them despite the orange muzzle tips in some jurisdictions. It is important to note that airsoft guns are not to be confused with BB guns, which are airguns that shoot metallic spherical pellets.