The Magpul RSA QD (MAG337) provides a forward mount for the MS4 dual QD sling or other quick detach carbine slings. The rail mounted QD socket is steel construction and rotation limited. It can be mounted on a side rail or top rail for precise angle and position.
Magpul Rail Sling Attachment QD Features:
-Steel Construction with Phosphate Finish
-Mounts on 1913 Picatinny Rail
-Made in USA