I'm sure the ATF will be very busy down on the southern border registering all the guns coming across. The drug dealers and human smugglers don't want to end up on some government list. Then there's the gangbangers in Chicago, Detroit, LA and ATL lining up to abide by the law.
They have no problem prosecuting law abiding citizens, they just don't mess with the hood rats. Just look at the Jan 6th people sitting in the DC Archipelago.