Magpul Industries Quick Detach Sling Swivel, Black MAG540-BLK Push-button quick-detach sling swivel for 1-1/4" webbing" compatible with QD sling attachment points. Manganese-phosphate finished steel. Combine with MS1 Sling for dedicated two-point sling" or with MS1 MS4 Adapter for two to one-point convertible sling. Made in U.S.A.