What are you talking about? None of my guns are registered, and I don’t intend that they will ever be.
And for those of us who had to fill out a BATFE Form 4473 for each gun purchase, that registers only the point of initial sale. There is as yet no legal requirement to report the sale of a firearm (in most states).
An old saying has it, “In order for there to be a registration law, there has to be a deregistration law.”
If the Feds show up at your door with a stack of 4473’s & demand “Where are they?”, the reply is, “Sold ‘em all.”
What are they going to do then, arrest you? Probably, they’ll have a ready excuse. Welcome to the new normal.