I honestly don't think anything the government does concerning guns is going to make a difference in regards to mass shootings. We need to have the ability to hold people for psychiatric treatment if a family member, police, or doctor asks for it.
That's pretty foolish. If the government took away all guns, there would absolutely be fewer mass shootings. I don't suggest we should go that route, but come on.
I understand, but taking away all guns is not a realistic option and there is no sense even talking about it. Every mass shooting we have, someone pops up and says "yeah, I new he was going to do something like this, he's crazy" or "we tried to get him help, but they told us they couldn't hold him unless he committed a crime".