NAGR email today:

"With the UN Gun Ban landing on President Obama's desk three day from now (June 3), D-Day for gun owners has arrived ... with a showdown battle over the UN Gun Ban looming in the U.S. Senate, I'm looking for One Million American Patriots to Pledge Opposition to Obama's Global Agenda IMMEDIATELY."
They have a petition here:

(It also has a gun giveaway drawing incentive.)

Just as effective, maybe more, would be calling your Senators and telling them how you feel about the UN Gun Ban. They got the message when we called in this year about the gun control bills!