WASR question

I saw a reference on another thread about how to tell if your WASR is made from defective parts. Is this possible? I have two WASRs, One is shoots about a minute of man. The other is very accurate for an AK. The more accurate one has the bayo lug and the welded barrel nut and the Century trigger group. The other has the slant break with TAPCO trigger group, both have half ass bayo lugs. I like both rifles and they have never given me a hiccup and I now have a M70ab2 and an SLR-95 as well.

Anyway, HOW DO YOU TELL IF ITS MADE OF DEFECTIVE PARTS?

Edit: Also is it possible that Cugir just milled out these barrels and parts for the WASR for the civilian market?

Thanks

jdub