Your priorities are seriously out of whack.
Class III weapons aren’t at issue. If anything you should be pointing at them screaming “THIS IS HOW WE SHOULD TREAT ALL GUNS! LOOK AT ALL THIS EVIDENCE THAT SHOWS THEY ARE NEVER USED IN CRIMES!”
But instead you fear them and are crusading to get rid of them, which is about as useful as crusading to end the bubonic plague at this point. Don’t worry about the bubonic plague, worry about heart disease, man.