Thanks Rob.Those mags on PSL are working as feeding ramps - smooth the edges out little bit at the exit ramp with file - so you can easily move rounds out with your thumb. That should take care of it.
As for the optic, I never had any good luck with anything more than 4x on those rifles...
Looking closer at the front of the magazines, I can see what you mean. My second mag has smaller and rougher grooves/ramps than the other. I've opened them up a bit and smoothed the edges.
The undersides of the lips are also sharp and rough, so I've cleaned those up and smoothed them out as well. We'll see how it goes next time out.
Is the bolt hold-open mechanism supposed to have a spring to hold it down, or does it just rely on gravity?