Said it before bring back TAVIS.Guns are already illegal. You can't buy a gun, if you don't have a license. Criminals buy illegal guns. Stopping to sell guns legally is not going to change that.
And start collecting race based data and publishing it.
And guns aren’t illegal you need a license to buy one. Certain firearms are prohibited to own e.g. gun which fires multiple rounds with a single trigger pull; that is known as an assault rifle used by the military.