Audere Adversus Scope Mount 30mm Tube 20MOA High Black. The patent pending Quick & Easy Zero Cant compensation system allows you to zero your scope much faster than traditional designs. The manual retention system prevents any unintentional loosening by utilizing spring-loaded turrets to apply tension as the retractor is moved into place. A spring-loaded ring actuated by the user tightens against the body of the mount tunable with a precision matched wrench. The ADVERS scope mount uses a patent pending retention system that generates tension in the mount around the body of the scope removing the necessity to re-zero the scope ever so slightly. This provides the shooter with much faster zero acquisition that does not require any manual tightening. Specifications for Audere Adversus Scope Mount: Manufacturer: Audere Fabric/Material: 7075-T651 Aluminum Color: Black Length: 4.75 in Ring Height: High Weight: 315 g Width: 6.65 in Finish: Type 3 Hard Coat Anodizing Hand: Ambidextrous Package Contents: Audere Scope Mount Adversus Audere AD0009: Adversus Scope Mount 30mm Tube 20MOA High Black