They have to know where they are before they can come and take them!
Only if they are sold.
If you don't sell them and they were bought private of before the old background check system was in place they don't know about them.
Any gun that you may have bought from a private seller without paper work they don't know you have it.
Sell it to a trusted friend and they still don't know where it is.
The friend must be
TRUSTED!!! They will never get them all, and that is a
FACT!!! LONGTOM