Western Australia

F19 Overseas visitors, temporary firearm permit.
Yes, you can bring firearms into Western Australia by filling out the Form 16.

ONE Overseas visitors need to ascertain from this website or by written correspondance with Firearms Branch, 210 Adelaide Terrace, Perth WA 6004, that they can actually license the firearm(s) they wish to visit Western Australia with (eg: you will not get a submachine gun licensed in Western Australia). The applicant will also require a genuine need and a genuine reason for bring the firearm(s) into Western Australia (eg: to compete in a specific competition, to be part of an licensed hunting group).

TWO Visitors will also require, from Firearms Branch, a Customs Importation Police approval form, known as a B709, which will be issued with the temporary firearm permit. This form permits the applicant, on arrival in Australia, a means of delaration to Customs officers, as to legality of firearm ownership and permission to bring these prohibited items into Western Australia.

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http://www.police.wa.gov.au/Services/FirearmsandWeapons.asp?FrequentlyAskedQuestions#F19