Yesterday, July 22, 2011, 51 U.S. Senators publicly went on record as opposing the ratification of any U.N. Small Arms/Gun Control Treaty that contained provisions restricting the civilian or private ownership of firearms and/or adversly effecting the 2nd Amendment. (Link Below)
U.S. Senate Stands with NRA in Strongly Opposing U.N Gun Control Efforts
Now, a few of those 51 Senators may go wobbly over what happened in Norway, but I fell that there will still be over 40 who will never vote to ratify any UN Treaty that contains provisions for restricting the 2nd Amendment/private or civilian ownership of firearms. As of now, if this treaty passes the UN with any restrictions (major or minor) on private/civilian ownership of firearms, it will be DOA in the Senate and not become law here.
As you may be aware, for any treaty to be ratified by the U.S. Senate, it requires 2/3 of the U.S. Senate to approve the treaty, or 67 Senators. So the UN can pass any Gun Control Treaty they wish, it will have no effect within the United States unless or until the U.S. Senate ratifies this. This does not take into account court challenges to any potential gun control treaty, challenging it on a constitutional basis.