Buyback programs in each State.
The government CANNOT buy back what they never owned! That is just a B.S. term for confiscation! There will be a lot of "stolen" firearms that somehow "disappear" if they attempt that.
I could somehow "lose" all of mine, but I will have access to plenty of "hammers" and "nails", just in case a "barn raising" breaks out.
To pursue such a course in the USA today would just decimate the entire country’s infrastructure, food production, tax revenue collection, military, thus leaving the country vulnerable to other countries like North Korea for invasion.
I would not be a bit surprised if that is not exactly what those anti-American, anti-border, government must take care of the subjects, left leaning sheeple want.