Item missing parts - Kinetic Development Group M-LOK QD Sling Mount

Ordered two, no problems with delivery. One package mounted without problems. One package was missing a nut. Evidently, counting to two is difficult for someone at Kinetic Development Group. Had to go through OP to get the missing nut. OP contacted KDG, and KDG sent out not one, but two nuts. So - originally needed two but got one, then needed one but got two. Well, it took a few extra weeks, but at least I was finally able to use the product. Several different brands of QD swivels lock in just fine.