It is easy enough to resurface the muzzle, all it takes is time and money. Fixing the ding in the rib would require either a new barrel or some welding and machining. (assuming I am looking at what you want me to look at.) never seen it on a NEW gun. if it was me I wouldn't even worry about the muzzle. the ding in the rib might bother me. then again it might not.
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