I picked what looks to be some sort of jig

on the side it says " USE ON LEFT SIDE OF M1icon, 1903A1 , 1903A3

AND CARBINE STOCK,

#07310066

It has 2 diagonally drilled holes, then 2 hole side by side

I think it might be for the rifle grenade sight.

what do you think.

p-5
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