Responsible gun owners have a duty to keep guns out of the hands of criminals. If you are forced to surrender your guns against your will make sure they are useless. Just in case they get lost on their way to be destroyed. For safety.
A dab of JB weld in the chamber should do the trick. Once the bolt closes, it ain't ever shooting again.
EDIT: To all the folks saying "Muh 1776!"... Only a small percentage of Americans went to war with the redcoats. A lot of people comply, for many reasons. This is for them, retailers especially, they can at least guarantee these guns don't go to Ukraine, Syria, ISIS, Gangbangers, etc.
In stores and gun shows. However we can still buy an AR from a guy in a parking lot outside the gun show. Or we can buy our friend's or family's gun(s).
Also if we are lucky enough to find some dumb liberal city doing a gun "buyback" and giving the morons HEB gift certificates, we can always walk up to the people in line and offer them cash instead - a little more than the "buy-back" people are offering.
I really need to figure out how to make an algorithm or a google news alert (is that still a thing?) to tell me whenever a buyback is happening within 250 miles of my home.
We don't require a background investigation for any of those cases.
And why would we?