Guys I have been up in the air about this now for a few weeks. I have always loved AAC and what they do in the market, but I have read and talked to several people now that have SDN-6s and they are not happy with there 51T QD system. Plus the SDN-6 is about 8db louder then the Specwar 762 on a 556 gun...If i get the Specwar 762 and use for my 556 gun I can then buy a Thunderbeast 30 and run on my 308, and 22-250 bolt guns...what do you guys think?