Some of these look like normal end mill machining marks when cutting with the side of the flutes. It looks like those were maybe cut when it was about time to change the end mill.
It's not a bearing or mating surface, I wouldn't be terribly concerned with it.
I don't own any h&k guns if it matters
It's not a bearing or mating surface, I wouldn't be terribly concerned with it.
I don't own any h&k guns if it matters


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