New to this topic?
Many (maybe most?) states do not have any form of gun registration. Certainly none of my guns have any "living registered owner," so nothing will change when I die.
Why would it suddenly be easy for those guns to be used in crime? That's like saying it would be easy to take over someone's house or use his car after he dies. Do you suppose no one is going to be responsible for those pieces of property? Why would guns be any different?