All semi automatc weapons are illegal in Aus but you can legally own a single shot gun / rifle
if you follow strict laws. Most farmers own guns for culling purposes but they have to be stored in a steel
case with a key lock (not padlock) and must be bolted to a concrete floor or locked up at a gun club.
The action bolt for the gun must be kept in a separate lockable case at least 50 meters away from the gun itself.

So if a robber comes in your house at night, forget the gun. Grab a baseball bat.

Although gun crime still happens, it's not to the same extent as the US and the police aren't called out as much.
When they are, it's not normally to do with guns but sometimes it is.

It's loud mouthed Fuckwits like Anthony Mundine who incite gun violence and now that he has proclaimed to become
a muslim, it will only make matters worse - for him.