AAC is set up now to deal more with distributors than direct dealer sales. A direct dealer order can easily be 9months out.
Try contacting Polite Society also in GA for any AAC needs and see what they have in stock.
http://www.politesocietyinc.com/
I have used the YHM QD .223 silencer and YHM QD 308 silencer. I think you will be happy with either.