I picked up a used Mossberg 500 from a local shot the other day, checked the barrel and took a peak inside the action to make sure everything looked good. No issues. I took the shotgun out and shot about 200 rounds at clays with no hick ups. I went to clean the gun and when i took the bolt out, I noticed some gashes in the receiver. Honestly, I really am not too worried about them. I am more curious on what would have caused these markings in the receiver? The only thing I could come up with would be a very small lodged rock.
I circled the spots in red. The yellow circles from other marks, but those look more like just regular wear marks from use. Thanks for any info.
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