Would you be wringing your hands over the UN if this were a prohibition on assault rifles we were talking about?
What handwringing are you speaking of and why assault weapons?
We don’t have a UN prohibition on modern sporting rifles, but we do have one on cannabis.
Apparently you are unable to speculate, or imagine implications, or your makeup does not allow you to. I find such things to be interesting, what will happen next? What would happen if...?