Remove the bolt and look at the bolt face.
The extractor rides along the inside edge of the bolt face and looks somewhat like a thin narrow spring inside a shallow groove.
At one end of the extractor is a "hook" - the other end is flat.
On the flat end, if it's a riveted extractor model, you will clearly see the rivet.
If you don't see it ian't there.
https://www.google.com/search?q=rem...=mXbDV4z6I5DsjwPL9rqgAQ#imgrc=ElGxR__dT8ASCM: