Airsoft is a sport that is enjoyed in the UK, US and NZ. Unfortunately, Airsoft cannot be played in Australia due to gun control laws. If someone were to import a airsoft gun, they would require a Australian Customs B709 Importation of Firearms – Police Confirmation and Certification Form, even if this is approved, they won't allow:

Guns with folding or detachable stocks. Guns capable of fully automatic fire. Guns that outwardly resemble a sub-machine gun or machine pistol.

A message for the Federal Government of Australia and ALL State Governments in Australia: Just because airsoft guns replicate real firearms, that doesn't mean they are firearms. Many (if not ALL) airsoft guns contain a highly visible orange tip which makes it obvious they are toys and not a threat. So there should be no reason why they should be banned in Australia