any federal involvement with the civilian possession of firearms that infringes on their rights is a direct violation of the second amendment, which clearly forbids federal involvement with firearms that would infringe in the right of the people to keep and bear arms...

however, the second amendment also clearly reserves to the states, the power to regulate civilian possession of firearms, in order to provide for a well regulated militia, which is necessary to the security of a free state...

so, it is really up to the states to solve the public shooting
problem, be it in a school, sports arena, concert venue or where ever there is a public gathering...and the solutions practiced by various states is as diverse as our society...for example, what works for new york state, may not necessaraily apply to georgia, etc...

keep it simple and keep it safe...