Questions about Allin Second Conversion

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I have acquired an Allin 1866 Second Conversion.

I am somewhat familiar with firearms, but new to Trapdoors.

I have found a few issues with this old piece and need some advice.

First is the wear pattern on the “locking bolt” as you can see in the photos the contact is not even. Is this something I should be concerned about ?

Next is the locking latch has an 1/8 inch gap between the retaining screw and the body of the bolt, I think I may be missing a piece ? If so what should I be looking for.

Lastly a horse type spring that fits into the left side of the receiver is broken. This has something to do with the ejection of the shell I believe. Is it called a friction spring ?

https://www.amazon.com/photos/groups/share/06Ia3TTvT02hrWkr7cnmtw.kogIMtWqITYtAZZ3LsWdC8

I know this is a lot of questions and I sincerely appreciate any advice y’all can give me.

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