Ultimate Arms Gear IDF Israeli Defense Forces Pair of Slip On Black Sling Mount Strap Loop Adapter with D-Ring For Mossberg 500 590 835 Maverick 88 12 20 Gauge Made In Israel, Designed for IDF Israeli Defense Special Forces. Color: Black. Includes 2 Adapters. Configures any Rifle/Shotgun to Accept A Shoulder Harness. Allows for Easy Access and Moving to Accommodate Any Situation. Simply Slide Through Hole and Loop Back Around, Easy Installation.