I noticed my poor M1icon has developed a crack in the barrel extending along the "bottom" of the spline for the gas cylinder on my arsenal replacement 12-51 Springfield barrel. I am working on getting another usgi barrel for this mixmaster shooter but I was wondering if anyone else has seen this type of failure?
None of my searches brought up anything relevant instead of receiver failures; I know this is the thinnest part of the barrel but it does seem strange.
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