IMO it has to be an ejector gun.
The kickers for the ejectors are plainly visible on the fore-end.
The split extractor/ejector rods also show where there is a point of contact for primary extraction, and a second point of contact for ejection.
Also in the photo showing the action in the open position, the extractor bodies are sitting in a position typical for a (cocked) ejector gun.
An extractor gun would (usually) have the extractor bodies raised much higher, and they would be sitting close to the breech face.

It's an ejector gun, but whether the ejectors still function correctly is anyones guess.