BB guns are air guns that shoot small metal or plastic pellets called BBs. They are often used for target practice, training, and recreational shooting. BB guns typically use compressed air or springs to propel the pellets, making them less powerful than traditional firearms. These guns come in various styles, including pneumatic, spring-powered, and CO2-powered models. While they can be fun and safe when used responsibly, it's important to follow safety guidelines and wear protective gear, as BBs can cause injury if misused. Always treat BB guns with the same respect as real firearms.