M1 carbine puzzle ??? help needed

[gunsdora]

I pic the carbine up not to long ago. & looking for info on it. Could this be part of a Prototype Sniperscope . War baybe page 235 . Not much info on it. I also have some pics on the CMP forum. Hope some one can help here. Receiver drilled & taped & also receiver was milled on the top & bottom were it was drilled & tape. ???. NPM carbine with a SA M2 stock. Stock also has a .U. rebuilding stamp . Hand guard is Inland 4 rivets. Will put more pics up. Lots of parts were chaged to Inland parts in the rebuilding. Thanks for any help.

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