Riton by Contessa 34mm Tactical Rifle Scope Rings Black NSN #. These high performance rings are designed for competition and tactical shooting. Specifications for Riton by Contessa 34mm Tactical Rifle Scope Rings: Manufacturer: Riton by Contessa Tube Diameter: 34 mm Fabric/Material: Hardened Steel Weight: 4.8 oz Color: Black Package Contents: Riton by Contessa 34mm Tactical Rifle Scope Rings Riton by Contessa XRC3410T23: 34mm Tactical Rifle Scope Rings Black NSN