It will be a co-ordinated massive assault on thousands, perhaps a million high profile gun owners at one time.
Lets take the posited middle ground of 100,000 at one time. You need at least 5 personnel for each raid. That is half a million law enforcement types, all coordinated at one time, with *none* of the people in the know leaking the information to the resistance in advance.
I posit it cannot be done. Probably half of federal law enforcement are at least nominally pro Second Amendment. Probably 5% are enthusiastically pro Second Amendment. Likely 1% take their oaths seriously.
The raids would be telegraphed and the intelligence would go out quickly.
Simply logistically not possible as put forward.
Too many moving parts, too many failure points.
For it to work, you need, at miminum, federal legislation nullifying the Second Amendment.
That would be a huge signal in itself. The resistance against that already dwarfs the resistance against actual confiscation.
So, how do you get there. You have to create a tyranny first.
To do that, you need government control of the Internet.
Lots of pre-event signals that make everyone more nervous and committed to resistance.
We have an actual example: New Orleans, hurricane Katrina.
They tried a full on push for total confiscation, when most residents were either gone or disoriented, and communications was disrupted.
There were a few tense standoffs.
There was embarrassing assaults on elderly.
The most heavily armed were left alone.
Most importantly, there was a behind-the-scenes revolt BY LAW ENFORCEMENT which brought the confiscation to a halt.
We have another example: Waco.
Surprise highly-coordinated raid with maximum talent & equipment.
4 agents killed in minutes (seconds?).
Ending standoff lasted weeks, ending in dozens killed.
You’re expecting hundreds of thousands of raids in a matter of hours, resources stretched thin, yet expect nearly no gov’t casualties and no retaliation (OKC bombing was retaliation for Waco, 183 dead).