bcn complete lowerAppeared it around so persistently and will't find the blem. Everytime I do think I obtain a thing off, it is simply oil smudges. Very best guess at this time is scuffs on castle nut, or The 2 little silver places during the flare of the magwell. 1mm dots at most. BCM QC isn't going to mess all around it seems.The Mk2 higher recei