Airsoft is a combat sport renowned for its authenticity, strategy, and team play. Also known as BB guns or soft guns, it involves the use of replica firearms that shoot non-lethal pellets called BBs. Airsoft enthusiasts often use the term "milsim" to describe the simulation of real military operations and tactics. Other synonyms for airsoft include skirmish, tactical gaming, war games, and air gun shooting. It is a popular activity around the world, particularly in Asian countries where it originated, and has a substantial following in the United States and Europe. Airsoft is played in designated fields, arenas, or courses carefully designed to offer an exciting and challenging experience to players.