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barrel. erosion

  1. 800 rounds, is this wear expected on my barrel?

    General Discussion
    Hey guys, So I have officially put about 800 rounds through my 1968 radom factory Polish AKM since last spring. While cleaning after shooting today I noticed a little bit of off color after finishing up at the crown of my barrel. Barrel is 4140 Nitride coated from arms of america. Is this...