Vortex Viper HD 5-25x50 FFP Riflescope, VMR-4 MRAD, 1/10 MRAD, 30mm Tube 30mm aircraft-grade aluminum tube, anodized low-glare matte black finish 50mm objective lens HD optical system ArmorTek coating protects against oil, dirt, and scratches Exposed locking turrets RevStop Zero System Elevation turret includes external rotation indicator 5-25X magnification system Eye relief: 3.4" Field of view: 23.6'-4.7' @ 100yds. Elevation range: 20 MRAD, in 1/10 MRAD increments Windage range: 12.4 MRAD, in 1/10 MRAD increments 10 MRAD per turret revolution Parallax: 20 yards to infinity VMR-4 laser-etched MRAD FFP illuminated reticle with 10 levels of brightness Fast-focus eyepiece Fogproof, shockproof Argon purged, O-ring sealed Includes sunshade, neoprene cover, lens cloth, custom turret tool, CR2032 battery, RevStop Zero Ring Length: 15.2" Weight: 25oz VIP Warranty, unlimited, lifetime, transferable