Not very astonishing to me but what is intriguing is what period of time would faking of these parts have become popular?
I'll speculate the rifle has been together for some time just judging by its appearance. When the wood was cut down the exposed stock lightening channel was filled with what looks like very fine sawdust and some sort of pre- plastics binder and the second finish is what appears to be a red clay or naturally pigmented mess of paint or something.
It looks great.