
I bought this shotgun off another CGNer years ago, ripped it apart and refinished it (I still need to install screw-in chokes, which I do myself). It worked great for early season ducks last fall. (I like using vintage shotguns for waterfowl.)

I have taken everything apart in the trigger mechanism, but can't get down to removing the firing pin from the bolt. Can't find anything on the interweb that helps.
The bolt is pulled from the action by simply removing a screw.
Then the bolt is broken in two by depressing a spring-loaded keeper next to the bolt handle and the bolt twisted to break in 2.
Beyond that it appears that there is a spring-loaded disc inside the rear bolt housing. It has a half-moon cut out, which would allow it to slip past a half-moon key inserted in the housing just in front of it.
I don't know whether to try and turn the internal disc or to try and remove the key?
Anyone with experience with this?
Just want to scour the rear bolt housing and its contents. I have already soaked and scoured it as best I can without disassembly...
...thanks for looking...