The Picatinny Rail Bipod Adapter/Sling Adapter allows the mounting of a Harris-type bipod or an ATK folding bipod on rifles equipped with Picatinny or quad rails or a sling. It is constructed of hard-anodized aircraft grade aluminum and steel. It also doubles as a sling swivel stud for quad rails. It comes with a mounting tool. It fits handguards with a Picatinny or Weaver rail.