llamatron: yes, WA is unrestricted.
http://megatron.net.au/MC_Masterpiece_MP05_WA.htm

Just like to point out that even fictitious replicas of fictitious guns that look "realistic", such as Original Trilogy Star Wars and Bladerunner guns. As stated on the Megatron Club site ("Breaking News" 5/1/2011).

My guess is that because a lay person with minimal to zero knowledge of science fiction weapons may mistake a realistic enough looking fictitious weapon for being a real gun.
e.g. Han Solo's blaster is actually based on the real life 9mm Mauser C96 pistol. While a person with sufficient knowledge of Han Solo's blaster and a Mauser C96 may be able to tell the difference, the average person probably wouldn't. Especially if it's produced in poor lighting and in a threatening situation where the person is in fear of their life and unlikely to pause and examine the pistol to see if it's real or not. AFAIK Deckard's gun isn't based on a real pistol, but it bears a similar appearance (shape, colour) as a real gun and so appears to be classified as requiring a permit in NSW.

Laws vary between states so you may need to check with your Police Ministry to be sure. But it seems that even approximations of real guns in NSW are prohibited and require a permit for importation and ownership.

Quote Originally Posted by MayzaPrime View Post
Man it really heaps when the Officer on the other end of the call is a Transformer collector.
That is awesome. When I was applying for my permit nearly 9 years ago I had to repeatedly explain to people what Megatron was. And I also had to repeatedly explain to people, including police, that it's a prohibited item and that I was applying for a permit, because I had several people try to dismiss me saying that I didn't need it and I had to continually reassure them that I most certainly did.