This is the first time I have seen anyone discuss this scenario. He pretty much has it right, too. It doesn’t end well. From his blog:
Let me explain, gun grabbers, how your confiscatory fantasy plays out. Let us imagine for a moment that a sweeping gun control bill similar to the one currently suggested is passed by the House and Senate, and signed into law by a contemptuous President.
Perhaps 50-100 million firearms currently owned by law-abiding citizens will become contraband with the stroke of a pen. Citizens will either register their firearms, or turn them in to agents of the federal government, or risk becoming criminals themselves. Faced with this choice, millions will indeed register their arms. Perhaps as many will claim they’ve sold their arms, or had them stolen. Suppose that as many as 200-250 million weapons of other types will go unregistered.
Tens of millions of Americans will refuse to comply with an order that is clearly a violation of the explicit intent of the Second Amendment. Among the most ardent opposing these measures will be military veterans, active duty servicemen, and local law enforcement officers.”