Bcn complete lower Seemed it over so over and over and will't find the blem. Everytime I feel I find anything off, it is simply oil smudges. Very best guess at this time is scuffs on castle nut, or The 2 tiny silver spots from the flare from the magwell. https://louisbukbq.blogmazing.com/28550900/the-definitive-guide-to-bcm-lower-complete