I've always thought that the way to end a LOT of gun violence is to simply make this bargain to gun sellers: follow the rules, get your background check, and register the sale. If you or the purchaser disagree with those rules, you are free to sell the gun with no paperwork whatsoever. But the seller is on the hook for any crimes committed by any subsequent possessor of the gun. You sell to your brother in law and nothing ever happens? Great. You sell to some stranger at a gun show and the gun is eventually used in a crime? You go to jail just as if you pulled the trigger. And this would include manufacturers, distributors, retail stores, etc.