Always have control of your firearm with the Magpul Rail Sling Attachment Quick Detach Sling Mount. The RSA-QD provides a forward attachment point for the Magpul MS4 Sling and other push button QD slings. It is Melonite finished steel; mounts on 1913 Picatinny rail, and places the attachment point at an angle optimized for comfortable two point sling use while maintaining easy push button access.