It works as far as i've used it - Bravo Company MFG End Plate with QD Socket For AR-15

The piece does exactly what it intends to do and installation was easy enough. Need a castle nut wrench, which I didn't have, but that was negligence on my part. Giving 4 stars because I haven't rigorously tested it with my sling, however it does fit the QD point like a glove and doesn't want to disconnect without me doing so.