Bah!
You will not be able to tell the JBTs you sold them, lost them, or whatever.
They have plenty of room in the camps. And if you are thinking "they can't arrest everybody", then I ask you, what do you think amnesty for illegals is for? Your replacements are already waiting to show up. You go to a camp, they illegals do your job for less. If the camp has a factory you work for nothing. The tyrants are happy, the illegals are happy (with YOUR citizenship), the corporations in on the camp-building and prison factories are happy, and the JBTs are happy.
If you don't end up arrested, they will likely tell you to go ahead and have, within a given time, the guns you are supposed to have to turn in, or else. Chances are they will have changed the laws by then to also arrest your spouse or siblings (more for the prison factories but who cares, plenty of ignorant compliant immigrants to replace those pesky Americans with that irritating culture of liberty) or take your home away. Then they will have people purchasing guns from each other just to turn in on the deadline, or else. They won't need to kick in every door, they will have you all doing it for them.
I choose else.