My daughter, who lives in Canberra, laughs when people say Australia is gun free since there seem to be shootings in Sydney on the news all the time. It seems they neglect to consider all the illegal guns smuggled into the country.
They do, but there are also millions of guns held legally. It's important to point that out, because if the only guns out there were the illegal ones in the hands of criminals, calls for further gun control might make more sense.
But legally held firearms are rarely used in crimes. We do have laws that say people with serious criminal histories, or recent minor criminal histories may be prevented from legally owning guns. But law abiding citizens can generally be trusted to remain law abiding.