The top five most viable "somethings" have already been discussed and ruled out, so what exactly is left?

It's a tragedy, but it's a repeating tragedy, and this thread will follow the same pattern as all previous US mass shooting discussion threads where people will oppose solutions without any viable alternatives.

A congressman got non-fatally shot a few months ago and nothing was done, so the barrier for inaction is really high: https://thinkprogress.org/shooting-congressional-baseball-pr...