What do these belong to????

A friend of mine found these while cleaning up their parents estate. I have no clue as to what/which weapon they belong to, but I'd guess it is something older and along the lines of precision shooting. Has anyone here seen something similar or have any idea what rifle these would go with?

Attachment 41047Attachment 41049Attachment 41051Attachment 41053

Any wood rear butt stock. The small pc looks like a fore end extension. I'd be interested in the b/stock extension. I have a project in mind, that may or may not work with.

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That buttstock extension is cool. If it doesn't get sold, let me know.