Magpul QD Rail Sling Attachment (RSA)
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.