I just came across a NPM carbine ser# 1495xxx and a Underwood barrel dated 6-43 with early features including a type 1 stock. It appears to be all correct and original except I question one part. The recoil plate is marked PR-B and is a type 3 plate. I find no reference to IBM sending that part to NPM and also wonder if maybe that type 3 plate might be a little to late to be correct. Its wear pattern matches exactly with the rear of the receiver so I assume its been there for a long time, maybe forever? Any one have thoughts on whether or not it might be correct?
Thank you.
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