There was a mass shooting there some years ago and after that Australia confiscated the guns, is my understanding. @StackSats.IO can probably be more specific.

Port Arthur... a totally staged and fabricated incident involving a special forces soldier and lots of video of the alleged killer in cloudy lighting on a day that was clear and sunny... and they almost killed the "suspect" while in custody with arson, the whole thing was a total sham... that a non-military trained person could effectively kill over 30 people in a crowded coffee shop without leaving one survivor to report their memory of the face of the shooter is a total red flag... the dude who did it was an arch marksman

If they intend to kill you do you care if it is legal or illegal? Does it matter what a piece of paper says? You forget that your piece of paper was merely an enumeration of rights you naturally already had...