Well, again, I’ve been here since ‘09 and the biggest issue is what you changed right off the bat. The factory rifle was coming with a six position stock with mix matched parts, causing many issues.
Im not sure who your guru is, there have been a few guys here who have since left that were quite the PSA 10 fans boys. They were lucky enough to receive a functioning rifle and refused to believe others had issues even though there were entire threads of us (mostly 98z5b) solving issue after issue.
The one barrel issue I vaguely remember is where a batch was put out with undersized gas ports causing cycling issues.
Thanks for your your service and welcome aboard. We have a campfire and beers brotherhood, so sit back and have a cold one on us.