Features:Broadband Multi-coated Lens to Provide Crystal Clear 3X ImageWide Field of View - 30% Bigger Than Comparable Models from Other BrandsWindage/Elevation Adjustability for Optimum View CenteringInnovative Flip-to-Side Mechanism for Quick Transition between 1X and 3X ImageAdjustable Eyepiece for Easy Dioptric CorrectionPrecision Machining and Anodizing for Maximum Strength and Wear ResistancePatented Quick-detach Lever Lock Mounting Base42mm Center Height for Most Common Dot Sight CombinationCompletely Sealed and Nitrogen Filled for Fog/Weather Proof