So I built an AK with a PSA barreled receiver.
New hammer spring, old Norinco trigger parts.

I’ve used Wolf Classic and Poly ammo for years in a Saiga and WASR with no failures but now I get dented primers but no ignition.
Getting about 1 failure to fire per mag.

I measured my PSA firing pin.
It is 3.266” long.
I don’t have another to compare it to, but the spec I’ve seen posted for an AK is 3.284”.

What is the correct length for a firing pin?

Protrusion from the bolt face of 0.040" seems to work for me.

Thanks wildearp.

I will check that.