Most of my hammerguns have firing pins retained by a small cap/nut.
I have noticed others that have a much larger head that are retained by a pin going in from the side of the action.
I assume these to be a later style, but happy to be corrected on that.
All of mine have springs in them to withdraw the firing pin once the rebounding hammer comes to rest.
On my new gun, there are no springs. This does not seem to be a problem opening the gun for some reason, but occasionally when closing it they foul on the extractor.
Now it could be someone simply took the springs out, but I don't think so, besides if I fit a spring they take up space not allowing enough pin protrusion.
Looking at the underside of the extractor there are corresponding notches which look like they are designed to "lift" the pins as the extractor slides past.
My other guns don't have these notches.
One pin is a poor replacement, and it could be simply replacing this and polishing both may solve the problem.
Anyone had similar experiences?