The Constitution guarantees us the right to keep and bear arms, as in guns, but do you really want the corner store selling fully automatic machine guns? In an age of bump stock rifles and assault rifles that are clearly designed to efficiently kill large numbers of people, isn’t it reasonable to draw a line? I can defend my home with a pump shotgun and/or revolver, but does the Constitution guarantee me the right to a 50 caliber machine gun? Surely we can, and do, apply reasonable limits and still respect the Constitution. Those who disagree are free to amend the Constitution, but in a world of lunatic mass murderers, good luck with that.