IlarMeilyr
Liability Reincarnate!
A. (from your own link, btw): The treaty would require countries that ratify it to establish national regulations to control the transfer of conventional arms and components and to regulate arms brokers, but it will not explicitly control the domestic use of weapons in any country.
B. Treaties with foreign nations cannot override the constitution. It's in the constitution.
Here ya go..
Read it for yourself and learn something.
Article VI, Clause 2
This Constitution, and the Laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the constitution or laws of any state to the contrary notwithstanding.
The Supremacy Clause does NOT place a treaty on par with the Constitution. What it SAYS, basically, translates into the more limited proposition that that US laws (and US ratified treaties) trump any STATE laws on the same topic.