Patriot Optics Cantilever Scope Mount 30mm. The slim profile design offers the weight of lightweight scope rings with the added rigidity and convenience of a one-piece mount. This elegant yet robust dual ring scope mount accommodates standard 30mm diameter tube rifle scopes. Specifications for Patriot Optics Cantilever 30mm Scope Mount: Manufacturer: Patriot Optics Gun Rail: Picatinny Fabric/Material: Aluminum Alloy Color: Black Length: 6.18 in Fit: Weaver/Picatinny rails Diameter: 30 mm Finish: Black Matte Package Contents: Patriot Optics Cantilever 30mm Scope Mount Hex Wrench Owners Manual Patriot Optics PO-CM-30mm: Cantilever Scope Mount 30mm