This is a mount for the Vortex Viper/Venom. It is made to fit in the dovetail. Mounting hardware included. This mount will work for the Vortex Viper/Venom, Burris FastFire, and Docter Sight. The screws that are included with this mount require a 5/64'' allen wrench for installation. This mount has a bottom radius of .468"". There should be a slight gap at the top of the radius between the receiver and the mount when mounted. The two spreads on this mount measure .500""-.505"" and .8625"". This should fit barrel/receiver diameters from .936""-1.350". Mfg: Egw
