She's a real Zastava M-90. She's built on a heavy RPK receiver and has the tritium flip up night sights.
And her left profile
She was originally stamped as an AK-47 but was sitting in customs when the Reagan ban (Thanks Ronnie) was enacted. The importer used an etching pen to scratch out the old model number and etched in M90.
Made back when there was still a Yugoslavia
I can take more detailed pics of any section. Just ask. I have a several other AK variants. More examples to follow.