Featuring an exposed locking elevation turret with the RevStop return-to-zero function, the Vortex 5-25x50 Viper HD FFP Riflescope is a versatile optic capable of long-range shooting in low light. High-transmission full multicoatings and ArmorTek protective layers ensure a bright, clear, glare-free image with protection of exterior lens surfaces from scratches, dirt, and oil stains. The VMR-4 reticle can be used to effectively determine ranges, holdovers, windage corrections, and moving target leads. Impact point correction adjusts at 1/4 MOA and the 30mm one-piece aluminum maintube provides ample room for elevation and windage adjustment for long shots. Optical Performance 3-15x magnification 44mm objective lens Antireflective fully multicoated to increase brightness and resolution ArmorTek scratch-resistant coating protects external lenses from damage, oil, and dirt VMR-4 MOA Illuminated Reticle Laser-etched on glass First focal plane holdovers apply at all magnification levels Tree-style with red illuminated crosshair Ranging capability Powered by one CR2032 battery Use and Handling 1/4 MOA per click impact point correction 42 MOA windage and 68 MOA elevation adjustment ranges 25 MOA travel per rotation 3.4" eye relief Construction Details 30mm maintube Exposed elevation turret with RZR zero stop 3" sunshade Waterproof and argon filled for fog-resistant performance Specifications Magnification: 5 to 25x Objective Lens Diameter: 50 mm Field of View: 5x: 23.6' @ 100 yd / 7.8 m @ 100 m 25x: 4.7' @ 100 yd / 1.6 m @ 100 m Exit Pupil Diameter: 5x: 10 mm 25x: 2 mm Eye Relief: 3.4" / 86.4 mm Impact Point Correction: 68 MOA (Elevation) / 42 MOA (Windage) Adjustment per Click: 1/4 MOA Parallax Correction: Yes, 20 yd / 18.3 m to Infinity Anti-Reflective Coatings: Fully Multicoated Reticle Type: VMR-4 MOA Reticle (First Focal Plane) Illumination: Battery-Powered Illumination: Red Maintube Diameter: 30 mm Mounting: No Battery: 1x CR2032 Environmental Resistance: Water-Resistant (Unrated) Fogproof: Yes, Argon Filled Material: Aluminum Dimensions: Length: 15.2" / 386.1 mm Weight: 25 oz / 709 g