Shop › GG&G QD REAR SLING ATCH MOSS 590 GG&G QD REAR SLING ATCH MOSS 590 $42.95 GG&G, Inc. Rear Sling Attachment Mount, Fits Moss 500/590, Quick Detach, with Heavy Duty QD Swivel, Black Finish GGG-1429 Quantity: Add To Cart Added! GG&G, Inc. Rear Sling Attachment Mount, Fits Moss 500/590, Quick Detach, with Heavy Duty QD Swivel, Black Finish GGG-1429