The problem with your argument is that if murder was legal, murder would happen way more than it does now. I am not pro gun control. I am just poking holes in your argument.
IF GUN CONTROL WILL STOP DEATHS BY SHOOTING; LETS MAKE MURDER CONTROL TO STOP DEATHS BY MURDER; OH WAIT; WE ALREADY HAVE THAT AND PEOPLE STILL GET MURDERED; MAYBE RESTRICTING EXISTING GUNS WON'T STOP CRIMINALS, LIKE HOW LAWS AGAINST MURDER DON'T ALWAYS STOP MURDERS. THE ONLY ONES WILLING TO FOLLOW THOSE RESTRICTIONS, AFTER ALL, ARE THE ONES A CRIMINAL IS MOST LIKELY TO SHOOT