A gel gun is a non-lethal device, designed to fire projectiles made of hydrated gel. These projectiles are soft and disintegrate on impact, minimizing the risk of serious injury. Popular in simulation and recreation games, gel guns are used in controlled environments, such as "gel ball" competitions, which simulate tactical combat, similar to paintball or airsoft. They have a design that varies between models of pistols, rifles and machine guns, usually run on a rechargeable battery or spring, and offer a fun and safe experience when operated with proper protective equipment.