Airsoft is a sport in which players use airsoft guns to fire plastic projectiles at other players in order to eliminate them. Due to the often-realistic appearance of airsoft guns and their ability to fire projectiles at relatively high speeds, laws have been put in place in many countries to regulate both the sport of airsoft and the guns themselves. Safety regulations in many areas require an orange or red tip on the end of the barrel in order to distinguish the airsoft gun from a working firearm. They are officially classed as "soft air devices" or "air compressed toys", depending on the jurisdiction. A handful of countries including Australia, Malaysia, and Singapore have laws that are deemed to be airsoft-unfriendly.

Airsoft guns are replica guns used in airsoft sports. They are a special type of low-power smoothbore air guns designed to shoot non-metallic spherical projectiles (bb) often colloquially referred to as "BBs", which are typically made of plastic or biodegradable resin materials. Airsoft gun powerplants are designed to have low muzzle energy ratings and the pellets have significantly less penetrative and stopping powers than conventional airguns, and are generally safe for competitive sporting and recreational purposes if proper protective gear is worn.