What makes you think that if the AWB is renewed it won't be made permanent (and broader, as well)?
Personally, I think that it won't get past the House. However, these things usually turn our worse for our RKBA than they should, especially when aided by a "coincidental" mass killing by some psychopath a week or so before a major vote is scheduled.
Plan "B" might be found in books like "Enemies Foreign and Domestic."