Rival Arms RARA92M4B Bipod Stud Mount Stud Mount Black
http://www.tandktactical.com/shop/788130032770-rival-arms-rara92m4b-bipod-stud-mount-stud-mount-black-27075
http://www.tandktactical.com/web/image/product.template/27075/image_1920?unique=e8fdc16
Rival Arm's Picatinny Bipod Stud Mount.
