Danny, If it's the short pin, that's the ejector. Like I mentioned before these bolts have blind pins holding them together and I know of no way to pull those out to do any repairs.

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Looking at your pictures again I think the problem might all be in your cocking knob or the end of the shaft it's attached to. It looks like the prong on the bottom of the cocking knob is slipping over the outside of the bolt body and not being held in the cocked position - either it's bent, loose, or the shaft is bent, this being out of place could be what's binding the firing pin. Look at these pictures again to see how the gun should stay cocked with the bolt opened or out of the gun.

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Gene