Airsoft is a sport which uses replica firearms to shoot small diameter plastic pellets. Common uses for airsoft are competitive gaming (similar to paintball), military simulations, target shooting, military and police training, and recreation. While similar in operation to BB guns, airsoft guns use lightweight (usually) plastic projectiles (BBs) 6mm (or 8mm) in diameter instead of metallic 4.5mm BBs. Airsoft guns also typically have a muzzle velocity of less than 180 m/s (600 ft/s), compared to a BB gun which may have a muzzle velocity of 365 m/s (1200 ft/s) or more. The combination of the lighter BB projectile, with greater surface area and the reduced muzzle velocity means that airsoft is generally considered safe when used in a controlled environment and with safety equipment like protective eyewear.
Airsoft games vary greatly in style and composition depending on location, budget, and the number of participants. However, they often range from short-term skirmishes and organized scenarios to military simulations and historical reenactments. Gaming with combat situations on a mock battlefield mainly involve the use of common military tactics to achieve the set objectives. Participants typically use varying types of airsoft weaponry along with either real or replica military gear and uniforms.