m98evolution Posted February 2, 2009 Share Posted February 2, 2009 Noob question. When cleaning my M3 S90 I noticed a line on the barrel bluing on each side of the barrel where the pump seems to make contact with the barrel. Is this normal wear? I only ask because I don't see the same wear in pictures online. Thanks in advance! Quote Link to comment Share on other sites More sharing options...
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