GG&G, Inc. Front Sling Mount, Fits Mossberg 590, Ambidextrous Design, Matte Finish, Black GGG-1084-2 The Mossberg 590 Front Sling Attachment is designed" manufactured and tested to accommodate HK Style Snap Hooks or Mash Hooks in combination with the GG&G Mossberg 590 Rear Sling Attachment in a conventional dual point sling setup.