ProMag PM108 Harris Bipod Adapter (Sling Swivel Stud to Picatinny Rail) Quick Disconnect Sling Swivel Stud to Picatinny Rail Allows the mounting of a Harris or ATK folding bipod to rifles equipped with Picatinny or quad rails Aircraft grade aluminum Hard anodized Be sure to see the ProMag packaging for details on their life time warranty against defects