I've only had good experiences with PSA. That would include:
14.7" CHF/CL 5.56 upper
16" 7.62x39 upper
10.5" 5.56 upper
a few stripped lowers.
I have the KS-47 - 7.62x39, that takes AK mags, and their AR-10 in 6½ Creedmoor. The Creed needed some gas block tuning, but now runs well and shoots very well. The KS-47 has run perfectly, and shoots pretty well.
