Total gun confiscation in the US will not be attempted - at least by anyone who is sane.
See, there's your problem. They aren't merely insane. They are also evil. Monstrously so. There will be only one way to stop them.
I hope we can use all legal means before using the "one way"; The idiots who make the laws care about one thing - getting re-elected so they can continue to make a lot of money through influence pedaling. There are some truly evil and insane a-holes in public office, and the RAT party (but not exclusively) does seem pretty evil, but until they break the Constitutional covenant, that document is a powerful club with which to smack them down.
We also have a hell of a lot of money behind us, since we know "you get all the justice you can afford." Any attempt to confiscate Constitutionally-protected arms will lead to big changes in the political landscape.