This aftermarket Harris style Bipod Adapter for sale is a Picatinny rail/sling swivel stud adapter, it allows the mounting of a Harris-type bipods or an ATK folding bipod on rifles equipped with Picatinny rail or quad rails or a sling. This bipod adapter for Picatinny Rail 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.