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Thanks. I've learned it was bought from CMP at Camp Perry during the matches in 2014

Sorry. I don't know what you want a photo of. To me the back end would be the stock butt.
https://www.milsurps.com/attachment.php?attachmentid=137655&d=1730724619

Thank you!
Where on the back end?
Here's a right side view of the back.
137658
Not even a hint of any stamps on the sides.

The butt plate ( which I assume CMP could have installed )
137659

Previous owner did not know who made the stock. What sort of photos and description could help identify the manufacturer? We can find no stamps on it. Just some dings.

The M1 was probably...