FACTS ABOUT BCM LOWER RECEIVER REVEALED

bcn complete lowerSeemed it above so over and over and will't locate the blem. Everytime I think I locate a thing off, it is simply oil smudges. Best guess at this point is scuffs on castle nut, or The 2 tiny silver places within the flare in the magwell. 1mm dots at most. BCM QC will not mess all over It appears.BCM proceeds to set the common for