A WWII GI said that right after the war they had to search a German town for guns, so they just went down to the police office for a list of gun owners, then went house-to-house confiscating what the Nazis didn't - mostly shotguns and target rifles.
At one house, an ex-soldier told the Yanks, "You're doing it all wrong. When we got the lists in Norway, we just said that everybody on the list who didn't come down to the station and turn them in would be shot."
Probably when the govt tries that in the future, they'll just issue a warrant for your arrest and let the traffic cop take the risk of disarming you.
YIKES!!! Sadly, they have likely kept the lists for the original purchase/waiting period for certain guns. By going "through the system" one may be inevitably "stuck in the system".
Good reason to take out brownshirts before they can put them on...