It's real, IMO (the butt plate). Look above the 1 between the spring and the casting. You can see the shadow is on the same side of that crevice as all the letters. The shadow is on the right side. All the distances between the groups of depressions are the same. There are a couple of inclusions that are the same as the real one too.
The stock is probably a replacement and someone used a real butt plate. Wish I would've been the winner.
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