It is also important to remember that the biggest threat from the dangerously mentally ill is not to the public, but to themselves. There are more suicides annually than murders.
Moreover, rifles, including the AR-15 assault-style rifles, are involved in only a few hundred cases of the tens of thousands of murders and suicides every year. Bloody year after blood-drenched year, handguns are many times the killers that rifles — of any type — are.