What Types of Guns Are Legal in Australia?
Theoretically, there is a fair range of weapons still lawful in Australia. In practice, however, getting a licence to own some of these categories of weapons is not straightforward.

That said, technically the categories you could apply for in your licence are:

Category A are shotguns, rimfire rifles, and air rifles, not including semi-automatic or lever-action rifles or shotguns.
Category B includes lever-action shotguns with a magazine capacity of five rounds, bolt-action and pump-action rifles, and muzzleloading weapons built after 1901.
Category C is for pump-action or self-loading shotguns with a magazine of five rounds or less, and it’s for semi-automatic rimfire rifles with a magazine capacity of no more than ten rounds. Those allowed to apply for a Category C weapons licence are farm workers, clay target shooters, firearms collectors, firearms instructors, firearms safety officers, and primary producers. Primary producers work in mining, forestry, logging, fishing, and farming.
Category D includes Category C weapons with magazines exceeding the limited number of rounds. However, government officials and primary producers are the only ones allowed to carry these.
Category H is for handguns.
Category R is for restricted weapons, including military-grade machine guns, fully automatic rifles, grenade launchers, rocket launchers, and anti-tank weaponry. You’re not likely to get this licence any time soon.

https://www.youtube.com/watch?v=RB-fzmWCq7I

There is a fair range of weapons still lawful in Australia, for Responsible Gun Owners

www.secta.com.au