IN some US jurisdictions what Biden is recommending is per se illegal under any circumstances.
In my opinion this is just part of the effort to drive a wedge between what they see as the two different types of gun owners/NRA members.
That isn't an opinion but a fact. That is the strategy employed at the Pennsylvania gun show and it is an open strategy of many in the gun control movement. It isn't so much as they believe there is an actual difference, but the strategy is to try and create the illusion of a division.