Hello Ray, You are right and so is Jack Belk. The right descrition for it is FN system 98 receiver.

Thank you for your entry,
Could you also comment please om the quality of the Belgian FN System 98 compared to the Mauser 98?
The one I am working on right now is in a mint condition but I'd rather choose to look for a German 98 action if these are considered of better quality steel. The workmanship on de FN's is as good as the early Mausers though.
Because there is no closed C-ring; would this mean that I might run into trouble when reloading cartridges fired from this receiver? I mean would there be a change for slight bulging near the bottom of the case? I usually only partly necksize my cartridges, just as much needed to ensure a firm grip on the bullet because I found out this benefits accuracy a lot.

The excellents Husvarnas rifles post WWII are made on FN actions , it have the closed C or not ? for me in a standard caliber like the '06 should be no problem as a few millions of rounds are fired with this actions and no reports of problem are known as a Blaser 93
Saludos

Daniel

I prefer the Military actions with the full "C" ring but many a fine custom rifle has been built off the FN action. If you are building a .30-06 I would procede without worry.

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When barreling a Mauser I cut the barrel shoulder with a tool turned a few degrees toward the muzzle. The shoulder is thereby not 90 degrees. More like 92-93 degrees.

When barrel comes up hard against inner collar the top edge of shoulder closes the gap.

Some thought years ago that one should make equal contact with inner collar and front of receiver at the same time. As pointed out most recently in this forum by Matt Williams this is not possible.

By undercutting the barrel shoulder I feel that it more easily yeids against receiver face eliminating gasp and acting somewhat like a lock washer.