OK, AAC is owned by the Cerberus group. Gonna be around a long time. Dead Air is owned by Bergara, good financial backing, prolly gonna be around a long time. SIG has been around a long time, not going anywhere due to their commercial and govt contract success (SIG makes great cans, I own one).
Griffin lacks integrity. There's a whole bunch of people (some in this thread) that also own select fire (in this thread, but not me) that have experience with suppressors and select fire. They're not worried about select fire and suppressors. Furthermore, how often are you doing mag dumps with select fire? Eleven years ago, AAC showed that their suppressors can handle select fire just fine (
http://www.silencertalk.com/forum/vi...e08188afb2a04e) and the state of the industry has moved forward since then.
I don't know a single centerfire rifle can user that worries about cleaning their can. Folks with more knowledge than I say not to worry about it. My advice is to find a 7.62 can from a company you trust, only use brakes (as a sacrificial blast baffle), and check bore alignment with a rod on the rifles you use it on.