I have at least 10 or more PSA uppers in various calibers. .223, .223 Wylde. 5.56, 6.5 Grendel
They have been from the best upper Ive ever have. An 18 FN made chrome lined 1/8 Wylde chamber that is an absolute Monster, tack driver! And being chrome lined, it should outlast me by 100 years! From my cold dead hands! 
To a just pathetic 12 Grendel pistol upper that was a legitimate 15 MOA at 100. 
Stuff happens!
Ive purchased a Ship Load of stuff from PSA, from just parts to complete guns and everything in between, they have always come through and answered the bell with any problem Ive had!
Guns, gun parts, etc, are a crap shoot, I dont care who you buy from, stuff happens. Its whether they back up what they sell! The biggest endorsement I can give PSA is, I still shop there with confidence! YMMV.
To a just pathetic 12 Grendel pistol upper that was a legitimate 15 MOA at 100. Stuff happens! Ive purchased a Ship Load of stuff from PSA, from just parts to complete guns and everything in between, they have always come through and answered the bell with any problem Ive had!
Guns, gun parts, etc, are a crap shoot, I dont care who you buy from, stuff happens. Its whether they back up what they sell! The biggest endorsement I can give PSA is, I still shop there with confidence!
YMMV.