I don't believe there will be anything done with an AW ban. There are just too many people that own semi autos for the government to confiscate. My uncle was a long time Ft Worth policeman and 20 years ago he said the government could never get the guns off the streets.
There is simply no reason to panic yet. Some of the posters in this thread act like they already have two black eyes and a bloody nose and there hasn't even been a fight yet. Contact your reps and congressmen. Get off the gun forums and get to work with emails and tell them that you oppose a gun ban. That is job one for me next week. I will do my part. I did it in 1994 and will do it again.