Reptilia Bubble Level AUS Accessory Black. Designed as part of our AUS Mount System as a way to keep the scope aligned and prevent the rifle from tilting to the side. This level is reversible to be used on the left or right side of the AUS Mount via the 4 mounting locations integrated in the AUS Mount body. Note: The AUS OFFSET bubble level was designed specifically around the Vortex Optics Razor HD Gen III 1-10 24 LVPO. Some larger windage knob optics may occlude the view of the offset. Specifications for Reptilia Bubble Level AUS Accessory: Manufacturer: Reptilia Finish: Type III Hardcoat Anodized Fabric/Material: Billet 7075-T6 Aluminum Condition: New Features of Reptilia Bubble Level AUS Accessory Bubble level offset compatible with AUS Package Contents: Reptilia Bubble Level AUS Accessory Reptilia 100-268: Bubble Level AUS Accessory Black