I bought a Fabrique Nationale d' Armes 16 ga. with 30" Krupp steel barrels. I handled the gun in a Cabela's store near me and I really like the way it came up and because it was a 16 gauge, my favorite I bought it cheap. It was a little loose , off face, so looking into it there was a large screw over the hinge pin on the left side, this was just a cap removed it to find another screw that was the hinge pin. Could not loosen it and looked over it carefully and where the gun breaks there was a tiny screw that secured it and prevented the hinge pin from turning (how I don't know). Unscrewing the hinge pin I found out it was slightly egg-shaped so turned it 180 deg. and lightly drilled a new spot for the set screw. The gun is a pleasure to shoot as it weighs 6 lbs. 1oz., 65mm chambers (2 9/16") side clips, Greener cross bolt. Made 1924-1927?
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[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]