The cat is out of the bag relative to 3d guns. No legislation will be able to prevent it. The gun control proponents will use this as a reason to tightly control ammunition.
ammunition is going to go the way of the tech dodo bird.
search you tube and find coil and rail guns. Thos just shoot a small slug. Those will become untraceable and the shapes infinit.
schumer is the environwako trying to ban wheels.