The rules differ from state to state, but they are similar. There are different categories giving you access to different types of firearms. Each category is basically 'needs' based. You can have a machine gun if you are a historic weapons collector (firing pin removed), but not for hunting. For normal hunting it's mainly bolt action firearms with limited capacity. If you were in pest control then there is a category for that and you can have semi automatic weapons with a larger capacity. There isn't a self defence category. You also need to prove the "need", you can't just say you are in pest control, you need to prove it. They tried to implement a common sense based rules system, I know governments and common sense don't mix so well but it's basically what we have.

You MUST register with a hunting club and store your guns with the club if you don't meet certain requirements allowing you to keep it on your property which includes again the 'need' part as well as the size of the property, can't generally keep gun/s if you are in the city but in rural areas its more likely, self defence doesn't count nor to protect your liberties.

Not to mention that fact you need a licence for airsoft and gel guns

Our freedom of speech is limited and controllable similar to Canada or the u.k so that is also incorrect.

As one of the fuckheads who has had to look into how to get a gun in Australia as well as live in it I think I have a clue and they have given so many hoops to jump through it would make an American laugh... you dont know.