SpecificationsConstruction: MetalMagnification: 1XWeight: 7.6 OzOptical Coating: BlueLength: 2.7 In.Objective Diameter: 22MmAdjust Method: CoinClick Value: 1/4 MoaReticle: Red/Green DotShockproof: YesNitrogen Filled: YesEye Relief: UnlimitedField Of View: 50 DegreesExit Pupil: 62MmLevels Of Brightness Control: 5Color: BlackFeaturesIncredibly Tough Tempered Metal Alloy Manufacturing Proves To Outlast And Endure In The Field Against The Elements And Debris.Blue Optical Coating Adds Ease In Visual Alignment Between Operator And Target.Dual Reticle Color Type Feature Allows A Red Or Green Visual Hue To Promote Optical Ease During Any Scenario.Incredibly Lightweight And Compact At Under A Lb.Adjustable Picatinny Rail Adapter System Easily Fits 22Mm Rails Making This One Versatile Reflex Sight.