John Saunders of NYC CNC posted up a short video and explains how to make your own QD sling adapter. Actually he just explains how to cut the hole to accept a QD sling. I don’t think this is quite DIY friendly since it does require a CNC and some knowledge of CAD. However, it does show how much work goes into what seems like a simple thing. Cutting a QD hole into some metal is not as easy as it seems.