The main problem is that the US has failed to take measures several decades if not centuries ago. Of course it's going to be incredibly hard to collect all firearms while stop selling them freely to (nearly) everyone.
Even then, buying illegal arms would still be possible. That can mostly and only be solved by better education and equality to eradicate reasons to own a gun. The gap between rich and poor is just faaaar too big in the US currently.
But increasing the amount of guns in circulation definitely won't do anything good.







