I think that many people who own guns attach to that ownership a sense of security, a sense that if confronted with the indifference of others to ones life liberty and or possessions, one would have a chance to defend oneself. With that regard there are a number of things about the AR platform that are appealing in that regard. And while one may have all of the optimism inherent in your vision of an AR or even a gun free world, think for a moment about what would happen if you were able to impose your opinion by force. You are rather naive in my opinion, self deluding if you will, to speak of the consequences of enforcing that ban as issues involving dust. I think you grossly underestimate the consequences of telling people that have to hand over to the authorities their rights of self defense, the tools with which they have spent perhaps even very considerable effort to acquire. I believe the answer has been given quite accurately, you will get them when you pry them from their cold dead hands.
You airy fairy liberals do not understand the significantly larger range of moral concerns that animate conservative thinking, the right to self defense probably being right at the top. You may stupidly believe, if I may say so, that the 2nd amendment isn't God given, well if it isn't, you fool, it has been given by billions of years if organic life adapting to survive. Only fools try to criminalize human nature.
Society wants to pass the buck as to why our children are being killed in schools. They will do nothing as individuals to take responsibility for curing their own inner rage. You will not see that all of your hatred of the evil done by guns is a projection of all the evil you have suffered at the hands of others who out of their own repressed hatred psychically murdered you as a child. That self ignorance is the enemy, not guns. There would be rare accidental deaths from guns if Americans were psychologically healthy.