I don’t own one. I’ve seen this sort of thing before.
Either the gun is trying to be virtually 100% like the original, or they are just saving money and passing it off as “authentic.” While you purists argue over what the original design called for. Ignoring the rest of the gun.
If it’s made today, why not replicate the look and make it better?
I mean given the choice I’d what the absolute original, because it would be a collector piece. If I’m buying a known knock off in a gun, I’d like it modern materials.
I offer the excellent Dead Air PBS-1 as an example. Looks the part with dramatically improved internals.