Riton by Contessa 34mm Light Picatinny Rifle Scope Rings 8mm height Black NSN #. This set of fixed rings mounts directly to a picatinny rail with integral double recoil stops. Specifications for Riton by Contessa 34mm Light Picatinny Rifle Scope Rings: Manufacturer: Riton by Contessa Tube Diameter: 34 mm Fabric/Material: 7075 Aluminum Color: Black Mount Type: Picatinny Gun Rail: Picatinny Package Contents: Riton by Contessa 34mm Light Picatinny Rifle Scope Rings Riton by Contessa XRC348A23: 34mm Light Picatinny Rifle Scope Rings 8mm height Black NSN