Every feature was put in place for one purpose: to help you get the maximum performance from your long-range firearms, at the range, hunting, or in a tactical environment. 2nd Generation Argon/Krypton Waterproofing 30mm Maintube 1/4 MOA Target 3:1 Zoom Ratio 6061-T6 Aircraft Quality Aluminum Blackened Lens Edges DiamondCoat 2 Dual Use Flip Back Lens Covers (Mark 4) Generous Eyebox Lockable Fast-Focus Eyepiece M5 Adjustments Super Fast-Focus Eyepiece Front Focal Plane (FFP) Tactile Power Selector Side Focus Twin Bias Spring Erector System Waterproof/Fogproof Xtended Twilight Lens System ** BLEMISHED products may or may not include accessories. Image may not represent the exact product number.