I’m not American, merely an Australian nerd. We don’t have the same culture regarding guns; so I apologise if this post is presumptive. Sadly, Australia has had some significant mass-slayings of its own.

I think removing guns is good risk mitigation as people identified by ldsudduth are unlikely to be able to source a highly effective weapon during their period of mental unbalance. The removal of high-powered weapons from the general community is not meant to disarm criminals, but make it harder for mentally unbalanced people to acquire highly effective weapons.