I have never heard of repro firing pin hosings so I presume it's original.
Show photos of the sides. Should be a waffenamt and serial.
There was a brief reproduction run about 6 years ago out of the Netherlands. They were recalled because of drill jig alignment issues but some may still be floating around (I still have mine).
The OP's picture shows an original part.
And you did post an article here bitching about, amongst other reproduction parts, those firing pin housings. Maybe post a link?