But as for the US and the 2nd. I would suggest if the intent of the 2nd was to ensure the people will have the ability to defend themselves vs a tyranical government (militia aspects which I believe it does) then they people should have fully automatic weapons of any sort. I would also suggest they should be able to own man portable RPGs and the like.
If it is just to protect people from criminals ( break and enter, car jacking etc) then stronger governmental control is in order.
I would tend to be on the side of the militia aspect of the 2nd