The Forward Sling Mount is a sling attachment point for the Mossberg 500/590 and Remington 870 series' of shotguns which clamps onto the barrel and extended magazine tube. It can be configured for use with either Push Button QD Sling Swivels or one-point clip-in style attachments such as the MS3 Paraclip, the HK Hook, ITW Mash Hook, and others. Made from precision cast steel that is Melonite treated for wear and corrosion resistance.
Big Book Catalog, Issue:73, Page:087
Big Book Catalog, Issue:73, Page:213