Guntec USA AR-15 Endplate For QD Single Point Sling Adapter w/Swivel QD-EGG-SWIVEL. The manufacturer says that Guntec USA AR-15 Endplate For QD 1-Point Sling Adapter is compatible with AR-15GUNTEC USA QD-EGG-SWIVEL: AR-15 Endplate For QD Single...