Rival Arms RARA45R001A Mount Adapter RMR to Vortex/Docter Black
http://www.tandktactical.com/shop/788130032176-rival-arms-rara45r001a-mount-adapter-rmr-to-vortex-docter-black-36542
http://www.tandktactical.com/web/image/product.template/36542/image_1920?unique=e072a6a
Mount adapter RMR to Vortex/Docter.