What is your point? It is OK if you are killed by someone you know?
If you prevent criminals from getting guns, then their crimes would be less lethal.
Is selling you "private cigarettes" to minors a right? In the same fashion, you do not have a right to sell guns to felons.
But where does the black market get their guns from? The laws that I propose would reduce the size of the black market, and less criminals would get their hands on guns.
Some..., yes. Only 10 to 15% of all illegal guns are stolen. At the moment there is no incentive to smuggle guns into the USA, because guns are so easily available. So that is not even an issue.
frontline: hot guns: "How Criminals Get Guns" | PBS
I am not assuming that criminals follow laws. If no law abiding citizen would sell a gun to a criminal, criminals would have no guns. Well, they would have to steal them, or smuggle them. It would be not impossible, but harder for them
to obtain guns. So, criminals would have less guns, and there would be less gun crimes and murders.