I currently own 4 suppressors, .22, 9mm, 9mm integral, .30 cal (.300 win mag rated).
The AAC 7.62 SD (
http://www.advanced-armament.com/product.aspx?pid=51) came out after I got my .30 cal or that is what I would have got. It is a great can. Quick detach. Quality. Can be used on anything smaller then .308 too (.300 Whisper, .243, .223, ect).
Even though a have a .30 cal can I have still debated about getting an SD after using one.