Bcn complete lower Appeared it above so persistently and can't discover the blem. Everytime I feel I come across anything off, it is simply oil smudges. Most effective guess at this point is scuffs on castle nut, or The 2 very small silver places inside the flare of the magwell. https://bcmlowerreceiver35679.rimmablog.com/28584570/about-bravo-company-lower