I understand your concern here, and agree that no civilian needs a fully automatic weapon (which have been illegal for decades already). But I can't find evidence that
even a single fully automatic weapon has been used in
any of the recent spate of mass shootings. Take
James Eagan Holmes, the killer who shot up a midnight showing of
The Dark Knight Rises in Aurora, Colorado in 2012. He planned the attack meticulously, booby-trapping his apartment with explosives before setting out with body armor, tear gas grenades, and several semi-automatic weapons. If
even Eagan didn't bother to illegally modify his M&P15 for fully automatic fire, is the possibility such a threat that we need to ban several popular gun platforms that are functionally no different from hunting rifles?
As Sarge mentioned above, fully automatic ARs can be fun, but they're ridiculously impractical-- inaccurate, unreliable, and they'll empty a magazine of expensive ammunition in seconds.
I was not defending Ryan.
The GOP is wholly owned by the NRA. Their narrow focus on "mental health issues" after every mass shooting is no more rational than the Left's obsession with certain weapon platforms.
The most effective defenses against mass shooting are cultural, but as I've lamented many times before, that sort of change is very difficult to bring about. Regarding technocratic policy changes that might make a difference, I'm not optimistic. There are more guns than people in this country.
Short of something extreme like a mass confiscation program (akin to
Australia's), I'm not sure meaningful progress can be made. And even then, that would likely only limit the damage done by insane loners like Roof, Dear and Eagan. Few states have stricter gun laws than France, but they've still got a growing problem with domestic Islamist terror attacks.