The SGA Receiver Sling Mount is an attachment point for the SGA Stock Series for clip-in style slings such as the MS3, HK Hook, or MASH Hook. Solid steel construction with durable Melonite Coating. User-configurable for left or right side attachment. Compatible with the Magpul SGA 870 and SGA 590 buttstocks only.
Big Book Catalog, Issue:69, Page:203