Leupold 120056 DeltaPoint Pro Cross Slot Mount Matte Black AR-15/M16
http://www.tandktactical.com/shop/030317006266-leupold-120056-deltapoint-pro-cross-slot-mount-matte-black-ar-15-m16-14105
http://www.tandktactical.com/web/image/product.template/14105/image_1920?unique=5a94a3e
The DeltaPoint Pro Cross Slot Mount is designed to fit on any Picatinny, Weaver, cantilever rail, or base that doesn't require a riser.
