Honestly, I have mixed feelings.
It will not affect function, accuracy, reliability and can't be seen without effort. For those that talk about barrel degradation: let me point your attention to the hole right through the barrel of every semi centerfire you own. I'm sure the barrel gas port isn't done until the barrel is mounted and this means it is done after chroming on every gun. I've seen no reports of degradation at the gas port of any gun, thus I assume it is a non-issue. Accuracy is not an issue as it occurs no where near the critical area, the crown, and the barrel is straight.
Having said that, I had a look, and I can't see any issue in mine. If it had it, (it may, I may have to shoot more and look again, only 120 rounds through it) I would feel righteous in getting some freebie or fix from the importer, just on the principle of a manufacturing defect deserving such.
Then again, they all shoot great, even the ones with a big chunk missing...