Can you provide some close up pictures of the other side of the receiver?
It might be an ACC/INTRAC import. Looks like their might be a muzzle cap welded on over threads. That was common on the first few Intrac batches.
Polishing a bolt carrier was a "thing" with US owners back in the 1990's, but not something Factory 54 (Maadi) did.
The buttstock looks like an ACE model that was available in that time period.
The rifle certainly looks clean.