At this point - we should just stand back and let them institute MORE gun control - IN CHICAGO. Why not run the experiment? I'm pretty sure I already know which way it's going to go: They will add more gun control - and murders will increase. With any luck Chicago will become some sort of dystopian tyranny where you get shot down in the street by the police just for making a finger gun - and their murder rate will quadruple over what they have now.
What's plainly obvious is that the gun control crowd is just never going to listen to reality - until reality murders them. I say go for it.