I bought an air gun in Visakhapatnam and I was wondering if I could take an air gun to home to Australia in my checked-in baggage?
Airlines may permit you to carry an air gun as checked baggage, but policies may differ from airline to airline. For example, Qantas permits firearms (including airsoft guns) to be carried under certain conditions.
However, an air gun is classified as a firearm for the purposes of the Customs (Prohibited Imports) Regulations 1956. You will not be able to import the item without the appropriate gun licence, acquisition permit and police certification.