Boy-Oh-Boy Someone did a number on this 1903

[enbloc8]

I take back my prior statement about "no gas relief holes"...in the full side view, the original (inadequate) gas vent hole is visible on the right side of the receiver ring. Not visible in the posted close-up pic. Derp.

That said, not all 1903 extractors have the corresponding vent hole...I wonder if that was a contributing factor here.

I'd still consider this receiver done, or at least due for some serious inspection.