Mossberg JM Pro Extra Part

[cfiore]

Hello, I am hoping someone can help me out.
I have a JM Pro and I was cleaning it today. Unfortunately, during the disassembly I had a black washer/spacer show up out of no where and I can not seem to find out where is goes. I know it is from the shotgun because my bench was cleaned before I started.
I've looked all over the web for a schematic and cant find one that has this spacer. The space has an O.D. of about 15/32.

The only thing I did not disassemble is the stock and safety.

Any help is appreciated.

Thanks


the washer/space is actually black

[awiner]

I have had my JM Pro stripped as well and never have seen that part.

[cfiore]

The washer looks copper in the photo but is actually Black. Have you seen one of those?

[awiner]

The washer looks copper in the photo but is actually Black. Have you seen one of those?

Negative. I will break mine down again and look for you.

[hermosabeach]

Does this video help? Gas Piston or spacer between the receiver?
Skip to about the 5 min mark

http://www.youtube.com/watch?v=9gYDr6DkDfY