Whatever you do, check it from time to time. I went with a Griffin Armament direct thread adapter for my Rev 9, mostly because there were no trigger lug adapters available. It's a little lighter and was only $25, so that's a bonus. I removed the whole piston assembly.
I would think Rocksett is a bit much for a suppressor part, are you talking about Rocksetting the 3 lug mount to the barrel? not the adapter to the suppressor right? I'd think one of the loctite would be better for that.