RH,
Glad you like your upper. I also have one of their uppers and I'm very impressed. It's accurate, well made and the finish is really good. Mine is 300 BLK (pistol gas system on 16" barrel) and my only complaint is that with most rounds it's over-gassed. The best ammunition I've found for it are the Sellier & Bellot 124 grain FMJ. No signs of too much pressure and shoots very accurately. I have the same PSA lower.. also a great product!
I'm going to put an adjustable gas block on it (something I had considered doing anyway) and that'll take care of the pressure issue.
