Remember, Holder/Obama can't just institute and AWB. They need Congress to pass it, so write your Congressmen (Senate, and House) and make your feeling known on any "gun or ammo bans". Make it clear that you will not vote for anyone who supports anti-gun legislation.
I do believe Obam will continue to use other means to limit legal firearm use through the EPA in lead bullet bans, etc. We need to fight that also.