That one has an internal firing pin. Well, you have to remove the side plate and pull the upper pin. Then the firing pin and spring come out in your hand. Check out the faq sticky above, as I have a diagram of what it looks like. Also if your not sure how to remove the sideplate there is detail strip information in there also.
Here is the print for your pleasure.
38 is the firing pin
97 is the pin that holds in in.