They have implemented a theoretical system that, in the minds of the anti-firearms crowd, meets their objectives. Lets take a realistic look at the Canadian situation. Approximately 1100 people per year die in Canada from being shot with a firearm. Of this figure, about 950 are suicides, and about 165 are firearms homicides of all classes. Look at the suicides.
Firearms use in suicides represents less than one-third of all suicides.
The other two-thirds use something other than firearms. The first conclusion would be one-third. But the two-thirds show that other methods work as well. We know that firearms are an effective suicide tool, so they would be used by those most determined to succeed. Switzerland mandates that every able-bodied man have a military rifle at the ready in his home at all times.