Criminals don’t follow laws. It’s true. But if Gun dealers want to stay in business they will. This makes it harder ONLY for criminals and the clinically insane to purchase guns at gun shows and on the internet etc… A universal background check is designed to force law abiding businesses to prevent these types of sales- eliminating many purchases that criminals and the insane are making now. The only reason you can oppose this- or a 72 hour waiting period- or mandatory training- is that it will slow the inordinate profits you are making as a manufacturer.