I just picked up a M92 PAP and I noticed some have the X Y stamps on the receiver and some do not. Is there a reason for this? Also, What recoil spring is everyone running, I was thinking about ordering a Wolf plus power spring to reduce stress on the receiver over time. Now I just have to wait for the plethora of parts I ordered to build her up and have fun. Thanks for your time guys, im an AR guy and wanted to dive into AK's for a bit and have some fun

I'm not sure about the purpose of the XY stampings. My guess is for added strength in the area around the trigger and hammer pin holes. But again that's a guess.

I use the ALG recoil spring in my 7.62AKs. The recoil spring that came in my NPAP was significantly shorter and appreciably weaker than standard combloc.

Thanks for the reply brother