Bcn complete lower Looked it more than so repeatedly and can't locate the blem. Everytime I believe I find one thing off, it is just oil smudges. Finest guess at this time is scuffs on castle nut, or The 2 very small silver places within the flare in the magwell. https://bcmlower46789.full-design.com/examine-this-report-on-bcm-lower-complete-71507118