Dang there are some hard headed people on here.
Listen close
There is no such thing as gun registration
No such thing as the government knowing who owns what
No need to take inherited guns unless class 3 to any place to have transferred
No need to get personal information from a buyer or seller in a person to person
You can legally ship a firearm person to person in the same state.
You can chose to use an FFL to sell a gun to another person but it is not required
When you fill out a 4473 form to buy from an FFL your information is not recorded in any database, the type or model of gun you buy is not put in a data base.
Form 4473 are not allowed to leave the place of business. If a serial number trace is required an agent or LEO comes to the place of business and finds the original 4473. A copy is then taken if needed.

I do think registration of some models may be in our future but the politician have a hard road to travel 2nd amendment rights cross party lines further than any other subject.

What do you mean by "get their numbers cleared?"