so i've shot over 1k rounds so far since i've owned my m9a1. it's finally beginning to show the "used" look. however my barrel is peening with the slide. i'm pretty sure its not normal as it's a little sharp. it's obviously slamming hard. here's the pics:
the wear is obvious on the top of the barrel

just to show that the metal is peening upwards

top of the slide where it's slamming


normal?
the wear is obvious on the top of the barrel

just to show that the metal is peening upwards

top of the slide where it's slamming


normal?

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