The real agenda of these folks at the UN, and in London, Tokyo, Brasilia, and the other capitals around the world of nations pushing the US to “come on board,” is not international regulation, but limiting the freedom we enjoy within the United States to keep and bear arms.
Back in the mid-1990s the NRA sent out postcards for members to mail to the head of the U.N. saying what they had planned was illegal under the U.S. Bill of Rights. I added a note to the one I sent. I told him the guns wouldn’t be voluntarily turned in even with monetary compensation. And if they sent people to take them by force to make sure anyone they sent brought their own body bags.