B-B, or "B-B gun," refers to a type of air gun that shoots small metal balls called B-Bs. These guns are often used for recreational shooting, target practice, and sometimes in competitions. B-B guns are typically powered by either spring-piston mechanisms or compressed air, making them popular for beginners and hobbyists. B-B guns can vary in design, with some resembling real firearms, while others have a more toy-like appearance. Safety is important when using B-B guns, as they can cause injury if not handled properly. Users are encouraged to wear protective eyewear and follow safety guidelines to prevent accidents.