Started a thread on the semi auto section & thought someone over here might know too. What would be the cause of excessive copper particles, pieces, specks on this portion of the bolt? The accumulation was so much that the bolt wouldn't close properly. After I took it out of the carrier I noticed the cause was the build up of copper exactly where the red arrow on the left is pointing to in the picture the same copper flakes specks accumulated on the bolt where the arrow on the right is pointing. Any solutions, and or causes would be appreciated. Thanks
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