Phil Arms early Fox - Barrel extension gap?

[Deadeye7]

I am trying to decide what, if anything, to do with the condition on this early Phil Arms Fox 12GA. There is a gap between end of the barrel extension and the action slot (see pics). It all locks up tight and the Krupp barrels are in great condition. While I don't think it weakens the lockup, would appreciate other views on that. Also thoughts on how to correct it.

[Researcher]

First, do all the serial numbers match? Checking my Philadelphia Arms Co. gun, the length of the top of the barrel extension is 15/32 inch, Did someone grind some metal off your rib extension or lengthen the slot in the standing breech?

Here is Ansley's Patent for the bolting, though it was issued after he had left Philadelphia Arms Co. and the Patent was assigned to his new A.H. Fox Gun Co.

[Deadeye7]

YEs all the numbers match. And the dimension, 15/32 is the same so apparently the slot was lengthened as it measures almost 17/32, I can't imagine why. If you look really closely at 10x you can see where it was done. A talented TIG man could likely fix it, fill in the slot, and then file to correct dimension, but it holds the potential to ruin the gun if the talent isn't deep enough. You think Turnbull could do it? Not sure the gun is worth the investment although I am going to restock it, but I will do that myself.

[dblgunfix]

I know of a way to resolve that issue

[jolly bill]

I know of a way to resolve that issue

Welcome to the Fox site dgf.

We sure would appreciate your thoughts.

[eightbore]

I would not touch that extension rib, it being a non Important part of a low value gun. I would shoot it and love it.