Thesoze, here is a link with a schematic for the MKII series of pistols. The bolts are pretty close to the same, they may in fact be exactly the same, I'm not sure.
If you look at the drawing you'll see that pt.#16(roll pin) holds pt.#14(firing pin) in place.
Underneath and in front of the firing pin are pt's. #15(firing pin rebound spring) and #40(rebound spring support).
Pt. #40 sits on a ledge that is cut into the bolt. One end of Pt. #15 fits onto a leg of pt. #40. The other end of pt. #15 rest against the 90° face at the bottom front of the firing pin.
Also in the bolt are pt.#70(extractor spring), then pt.#69(extractor plunger) which holds pt.# 11(extractor) in place.
I hope this will be of some help to you.
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