Side scope mount, is this a USGI part?

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Was in a box of parts I got.

Has serial and green finish that reminds me of M1 carbine, or M1 rifle parkerized finish.
Has rounded back end, like it fits on a side of a receiver.
Dovetail rail on top, with two recesses (for screws perhaps)

About 2.5 inches long, 1 inch high.

Any ideas?

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I don't but that looks cool tho.

The "notch's" appear to be the type used with Unertl rings.
I do not think it is for a side mount.
IMO.
Ed