Solid qd swivel - Bravo Company MFG Bcmgunfighter Quick Detach Sling Swivel Heavy Duty Design

It works: seems really smooth, solid, and strong. Finishing/machining is nice as well. It's worth paying a little extra for these as the quality seems a lot higher. I've used two of these swivels with my two point sling set up and they have worked well. I have also used Magpul and Daniel Defense swivels and the BCM is (slightly) my favorite. You can't go wrong with any of the 3 just price compare and choose the best deal.