I’m law enforcement and have been for almost 13 years. I can say without hesitation that the day they tell us to do that 90% of us would quit.
I took an oath to support and uphold the constitution and that included the 2nd amendment.
I don’t think this scenario will ever happen in my lifetime and it would not be enforced as law enforcement agencies and agents would refuse to carry it out.
Everyone thinks Federal agents would do this but I know plenty of them and it’s no different for them than it is for cops and most of them are just regular Joe’s.
I was in the Army for 7 years before that and I don’t think they would do it either.
That’s my .02
Also, I recall that, a few years ago, they surveyed, at some level a bunch of Marines about conducting operations in the US to disarm American Citizens.
IIRC, a majority said they would do it.