Pete, from what i know, all guns are registered, theres a paper trail for all firearms? In most sates i predict anyway.

Make a public announcement that everybody will have to hand over their firearms at specific locations in their state. Slap a major fine on refusing to do it, then cross reference the paper work with what was handed over. Then go knocking on doors of people who failed to handed them in, fine them! now yer making money!

It would be a very slow pain in the bollox process that will possibly take many years, but its a start. And allow people to carry arms for those rare situations you were referring too. Or just allow people to carry revolvers..

Or

Do nothing and likely see this trend of mass murder continue


Heck I'm even finding it hard to think what a US citizen would need an assault rifle over a side arm for in regards to protection