Well I certainly trust that they deleted every one of those background checks, don't you? </s>
Once you have applied for a background check you have, for all intents and purposes, registered your gun.
Even under Bush 43, the NIC check data was being bogarted and squirreled away by the FBI and ATF, in defiance of Congress and the black-letter laws they had made that forbade disposing of the data.
Presumably this activity had Mr. Bush's acquiescence. Gentlemen, you see, agree that the helots should not be armed, in a well-ordered society, such as the New World Order, in which everyone knows his place.
'Tis so. These agencies seem not to care what "legitimacy" means.