Need help with a stuck firing pin......

[sheepherder]

It sounds & looks like you missed the cut that the firing pin guide locks into. Went right past and now you have the guide bound up on its tab. Not good.

I would turn the guide with the screwdriver until the tab is lined up with the groove and then tap a thin rod down the firing pin hole, and try to hit the tip of the firing pin.

It would be fairly simple for a machinist friend to make up a drift that fits in the chamber and engages the firing pin hole in the breechblock. The drift would be steady in the chamber and would hit the firing pin tip-on and a squib rod down the barrel could tap the now-aligned guide back out.

I tend to think in specialized tools for repetitive repairs - a hammer and nail might work, and you only have to do it once.