Not the local guys. Just look at CO. - You know how many sheriffs are against the anti-2A magazine restrictions there? Pretty much everywhere but Denver proper. They don't enforce it, and actively work against it.
Actively working against it? By arresting the lawmakers that passed this immoral and unconstitutional infringement on the Rights of Coloradans?
By not including it in the list of charges for someone they arrest for something else?
Yes, the local guys boots do their own fair share of treading, and will be the ones that "come and take" them.
The feds couldn't do it without the locals.
Besides, it wouldn't be done as some sort of mass disarmament campaign where these officers get briefed "the Second Amendment was repealed last night, and we're going to get the guns."
It'll play out more like this scenario written by a former DEA agent during the last Administration:
This is the same way a few bad people get a whole lot of good people to do bad things. Hitler didn't round up 6 millions Jews, shoot them, work them to death and burn their bodies.
Stalin didn't starve 12.4 million Ukrainians to death in 1932/1933.
Tens of thousands of "regular" Germans and Soviets did. You know - neighbors and countrymen did.
Oh, I see..... they're rising up for a photo op for the NRA. What are they actively doing to defy the law?
For someone so well read and well educated, you got a lot of shit to learn about your countrymen.
I know my countrymen quite well. We are, if we would be honest with ourselves, a country of 330+ million petty tyrants who believe and vote to use the coercive force of government against those who believe differently than we do.
Republicans are ok with the surveillance state, or drone strikes, or government controlled healthcare so long as the GOP is in charge. Democrats are no different so long as they run the show.
Liberty isn't valued in these United States. The illusion of safety, though - we love us some security because of the terrorists.
Further, I have friends and family who are cops. I've heard them brag about shutting down peaceful protests. Or excuse killing and maiming innocents when mistakes happen (cost of doing business) if asked about high profile screw ups.
I know our countrymen quite well enough to know that of all the dangers facing the tattered remains of our Republic, We, the People are part and parcel with it's demise.
And ya, if my buddies come after me for some "plant" or whatever unconstitutionally illegal product has been mandated as such- they'll be at the end of a barrel, friend or not. They know that. That's a choice they have to make on their own.
They choose to do that every day, against folks they know will shoot them for being there and don't blink an eye.
You think you're something different?
Let's say they hit your house - you shoot and kill one of them, you'll be excoriated as a cop killer - flags will hang from overpasses and bagpipes will fill the air with their solemn, doleful tune.
The news folks will talk about how you flew the Gadsden flag and made some controversial anti-government statements on the internet (calling Obama out on something - again, the details would sideline the narrative), and be sure and get a good shot of the widow and the officer's now orphaned kids.
And the defenders of the thin blue line will demand even more powers and equipment to "make sure they go home safe at the end of shift."