Hello! I recently had a g19 gen3 replaced with a gen4 due to the erratic ejection issues you're already heard so much about. Quick question on my new gen4... I like the way it performs but noticed some unusual wear. It's a scratch on the top of the barrel and has an identical scratch in the slide. Attached are pictures. Just need some feedback to feel confident this isn't something I should worry about or should I send it back to Glock for a replacement? Any feedback would be appreciated.