BARSKA Cantilever Riflescope Mount with Integrated 30-mm Rings 6 heavy duty screws (included) keep the optic in place and a large thumb lock screw keep the mount securely on firearm Pair of cantilever flat top AR rings with integrated 30mm ring and 1 inch detachable rail top and 1 Inch inserts Forward offset mounting ring allows mounting of longer riflescopes on your flat top AR Includes Picatinny rail top for mounting optional shooting accessory 1 Year Limited Warranty