I believe that is a BAM 3. That thing has been around for a very long time. You can get rebuild parts. That one looks to be an older model. Looks like the trigger guard is metal? The newer one I'd say from mid 80s are plastic. At any rate still a cool wall hanger how it sits
I think that one I saw on amazon and previously posted looks a lot like a bam 3 . On amazon it referred to as a B3. Probably one factory in China cranking them out.
I have one. Not quite as rusty. With some work can be made to shoot fairly well. Would be a nice project. The problem would be to not go overboard with your spending, cuz at the end of the road, it's still a cheap Chinese rifle. Lots of poop out there on these...
Even though its not a gun you would shoot much, it would be be worth the time, not much money, just to see how it would clean up. Then it would be a good conversation piece.