I have several AAC suppressors and have been happy with all of them. However, I will be looking at different brands in the future. I bought the 762-SDN-6 for a SBR 300BO. It works great on that rifle. I bought a 2nd 51T mount to use it on a 300BO bolt gun. It does not lock up like I would like it to. I also have a MK13-SD and can say that the 90T mount is far superior. The Silencerco Saker will be my next 30 cal purchase and it will go on the bolt 300BO. Side by side it is finished better, the demonstrations of the abuse it can take are impressive, to say the least, and it's rated for 300 UltraMag. I always use suppressors that are rated higher than required because I want to minimize the chances of wearing it out and going through the NFA process again.
While evaluating performance and value are first on my list, a final qualifier is who I am doing business with. AAC has gone from local guys to a far flung corporation. I have heard that there are plenty of changes coming beyond what the article referenced that don't make me feel comfortable. I feel this is unfortunate, and maybe a little sad. My own business philosophy does not intersect with what I have seen coming from The Freedom Group. It is worth taking the time to pour through these pages, and other forums, to see which manufacturers are in tune with their customer base and how they respond to them. This is why I have an Octane 9 sitting with my dealer right now, and am looking forward to the 223P-2.