I am still waiting for just some type of solution other than gun control. All the other side comments seem to be made in order to avoid this answer.
I suggest watching some serious documentaries on this type of thing, they never say that gun control is the answer and these are unbiased people in favor of gun control. In mass shooting gun control is part of the problem it is not the problem. If you offer a solution it could include stricter gun regulations, but that is not a solution to make mass shootings go away either.
My first step towards a solution is stop looking at it through such a narrow view. Start there, then if you really want your gun control to have an impact you cannot ignore the individuals who perpetrate these things and what they have in common and what brings them to this point. Suicide + rampage shooting to fame.
I think to say that you do have an answer is short sited. Kind of like the witnesses that put the solutions to problems in the context of "this will fix it". Its a super complex problem and I would not be so arrogant to admit to have the ultimate answer to something so complicated. I just know gun control is small band-aid on a big wound. Its something, but its not going to stop it.
What are there 400 million guns in america? Those aren't gonna disappear for a very very long time and mexico has a steady supply of illegal knock offs coming in daily.