In practical terms, with no emotion-driven outrage/horror/grief, no matter what the authorities decide, a solution is as far away as ever. If rifle and ammunition sales were banned immediately, the mountain of existing kit already out there would not evaporate, gun crime would not stop or even abate. Until this is realised/admitted then more effective measures will not be sought by the those who are demanding immediate action, pointing this out is NOT backing the NRA/trump camp, in any way or intent, just an assessment of the situation. America is unique in many ways, where else in the modern world do ordinary folk fear being shot in public spaces ? and the reaction to it being to carry a means of self-defence. Nowhere else has a gun-lobby that can and does affect elections. Some solutions suggested, such as profiling the population from child-hood are abhorrent to most, open to mistakes and involve huge expense but may have to be considered eventually. One thing is certain, relying on "the market" to stop these atrocities is not the answer....