I'm afraid this won't be enough. I have a bad feeling this event will galvanize support for gun control and at the very least, we can expect a line-for-line resurrection of the Clinton-era AWB right around the corner. Obama will cut a deal with House Republicans to push it through. Obama currently enjoys political capital that Clinton didn't have in '94. He doesn't have to worry about re-election and nobody's afraid of the "Angry White Male" like they were two decades ago. The minority and female voters who sent Obama back to the White House will support him on this.
Twenty dead kindergartners a week before Christmas changes things. Every soccer mom in America is going to be howling for Obama to do something.
Good ol' Freeper Pessimism. I expect no the AWB will not be restored. No way would it pass the House.