Bcn complete lower Great solution. Only blem is a small scratch on the top of your qd conclusion sling mount via the castle nut. No big offer to me and saved $90. Cheaper than constructing my spikes tactical lower with bcm components. In addition you obtain a stacked castle nut https://franciscobtkeu.blogdeazar.com/28950004/how-much-you-need-to-expect-you-ll-pay-for-a-good-bcm-lower