The best part is the justification for banning them, "ghost guns" weren't showing up in crime except for staged events so they decided to count guns with the serial removed as "ghost guns". That's already been illegal since 1968.

Here's the irony of the situation, though. Regardless of how overly complex it is or how wide a legal net the ATF decides to cast, this rule change will have little to no effect.

That's because of the 0% Receiver.

In response to the announcement of the Biden Admin's proposed rule change, Defense Distributed decided to shift its focus to the creation of 0% receivers.

What used to be a cheap process now needs an expensive CNC machine kit that can mill out a lower from scratch. That's not "having little to no effect". Drastically raising the cost of doing something is tantamount to a ban if the vast majority of people can't afford it.

I think they know it's going to get tossed in court and they're using the well-known negotiating tactic of "anchoring." That is, they're proposing something outrageous to distract you from the real intent, which is to establish a national registry of firearms and force FFLs to bear the trouble and expense of maintaining it.