Originally Posted by brettc
I just see the "chip". I would think the Gas port would have more of a uniform circle, while the mark I'm referring too seems to be a gouge. BUT it's in the same location as where the gas port would be. Should I be concerned about a "rough" gas port? Sorry I can't explain what I'm seeing more accurately
No, it is not a major cause for concern unless it continues to peel rapidly over a short period of time. There is usually some erosion at the gas port that happens over time. Again, as the port is drilled, it is not uncommon to have some burrs around the edge that bullets will catch and burnish in the beginning of the barrels life. This should stabilize a bit, but erosion will happen in any barrel at the gas port over time. It is only a major cause for concern if it continues to expand rapidly or if you are seeing an effect on accuracy, but there is enough barrel past the gas port to keep a bullet stable to the muzzle, that it should be unlikely to see an effect on accuracy.