You clearly *don't* understand how the black market works, as AK47s in third-world countries are dirt cheap. In Australia, gangs are simply manufacturing their own machine guns now.

Canada, Australia, Japan... you have to look at other factors in those countries, such as national character and ethnic homogeny. And Australia is turning out less and less to be the violent crime free paradise the anti-rights propaganda would have us believe it is. 

Gun control doesn't seem to be working out in Europe of late, where there's been an Islamic attack on average every four days.