Since everyone seems to be asleep on the Fox site, thought I would post this here!!!!
This is an early Phil Arms Fox. The gap between barrel extension and action slot would appear to be because the end was removed from barrel extension.
I don't think it compromises lock up which is very solid, and the Krupp barrels are in excellent shape, but interested in other thoughts. Also method to close the gap/repair it?

Quite interesting how close the external features are to a Parker, except for the tang length which is longer, the action shape is dead on a Parker. I will likely use a semi-inletted Parker stock I have on this to restock it!