The Magpul SGA Sling Mount works as a connecting point for the Remington 870 SGA shotgun and single-point clip-in mounts, such as MS3 Paraclip, HK hook, ITW MASH hook and others. You can attach the loop on the left and right side of the Magpul SGA stock. The loop is made of very durable, precision-cast steel treated with Melonite surface technology.