...And what happens to the Americans who refuse to obey these Stalinists?
They get arrested. And since legal gun in NYC is registered, they know exactly where to find them.
The cops show up at your door to confiscate the "illegal" weapons. Happened to a friend who lived on Staten Island in the 90s. His wife had failed to renew the registration on his long guns on time.
This is a perfect opportunity for communities or neighborhoods to organize. Police typically will target a single home or individual and deploy an army against it, knowing that the overwhelming force will afford the effort success. It’s a slightly different story if they have to take on an entire neighborhood, with ideal sniper hides, equal force, and the prospect of heavy losses.
A "vacation" in one of those neat little FEMA camps?