TOP BCM LOWER COMPLETE SECRETS

bcn complete lowerLooked it above so persistently and can't find the blem. Everytime I believe I come across some thing off, it is just oil smudges. Ideal guess at this stage is scuffs on castle nut, or The 2 tiny silver spots within the flare on the magwell. 1mm dots at most. BCM QC won't mess around It appears.The Mk2 higher receiver moves mass i