I have to admit I had never heard of Rex Silentium until another Montana LRH member mentioned it (sorry, I cannot remember who provided the information but thank you very much). I wanted to support my local economy and went a made-in Montana product (my 2nd, 1st was Eliteiron). The guys at Rex Silentium are amazing; the can was at my FFL in 3 days upon payment.
This new Silencer Shop way is a nearly painless process to me. It would have been even more straightforward if I had bought the suppressor from Silencer Shop. In either case, it is a breeze.
Ed