Is right where it slides under the extractor, it was tight before and I filed the top of the pin there enough to let it slide freely thinking if there was any drag it would act as a brake and limit pin travel/striking force. I think I might have gone too far and it might be riding up and only barely hitting the rim. The firing pin depth is so shallow its hard to tell. I think I'll take it to work tomorrow and use a punch and hammer to usage that surface out and then very cautiously remove metal just till its free. Other than that I'm at a loss.

Rob, what are you talking about when you say that it won't extract? Does it leave the case in the chamber or does it pull it out partially and drop it in the action?

The reason I ask is that Dad had a Marlin 25 when we were growing up. It was marvelously accurate but extraction was iffy at times. It had the same type of extractor setup, from what I recall. At the time I didn't know much about filing on guns and such, but today I'd give that extractor a few strokes with a fine file to see if I could get it to bite into the rim a bit when moving backwards. I don't think the extraction issue is related to the firing pin issue. Methinks they are separate problems. Once you get it to fire, take a look at what it would take for the extractor to grip that rim long enough to get it out and toss it a ways.

That is identical to yours except it is a 187M. Gun is missing internals to make it semi auto. Numerich parts lists are the same. Would be happy to mail you parts if needed.