When success rides on the perfect shot, rely on the exceptional versatility and optical performance of Viper HD. From big game to predators, there s a proven model for every hunting application. Each member of the Viper HD family delivers outstanding image clarity, resolution, and sharpness to ensure your target comes into view with sharp detail. Viper HD also boasts enhanced features for unmatched accuracy at extended ranges while also excelling in the low light of dawn and dusk when game is most active. Product Features HD Optical System: Optimized with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity, edge-to-edge sharpness and light transmission. Illuminated Reticle: Provides precise aiming under low-light conditions. 30mm Main Tube: For increased travel. Exposed Locking Elevation Turret: Integrated locking mechanism prevents accidental adjustments. Elevation turret provides fast, accurate, easily read elevation adjustments. RevStop Zero System: For a rock-solid return to zero after turret adjustments. Fully Multi-Coated Lenses: Anti-reflective coatings on all air-to-glass surfaces provide increased light transmission for greater clarity and low-light performance. ArmorTek : Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. Argon Gas Purged: Gas purged and O-ring sealed for fogproof and waterproof performance in all conditions. Fast Focus Eyepiece: Allows quick and easy reticle focusing. Aircraft-Grade Aluminum: Constructed from a solid block of aircraft-grade aluminum for strength and rigidity. Low Glare Matte Black Anodize: Corrosion and wear resistant anodization provides low-glare matte surface and helps camouflage the shooter's position. Single-Piece Tube: Maximizes alignment for improved accuracy and optimum visual performance, as well as ensures strength and waterproofness. Waterproof: Designed to withstand harsh weather conditions. Fogproof: Nitrogen gas purging prevents internal fogging over a wide range of temperatures. Shockproof: Designed to withstand the highest levels of recoil and impact. Product Specifications Magnification: 5-25x Objective Lens: Diameter 50 mm Focal Plane: Second Focal Plane Reticle: VMR-3 (MRAD) Turret Style: Exposed Elevation Capped Windage Tube Size: 30 mm Adjustment Graduation: .1 MRAD Parallax Setting: 20 yds. - Max Windage Adjustment: 12.4 MRAD Max Elevation Adjustment: 20MRAD Travel Per Rotation: 10 MRAD Total Elevation Adjustment w/ RevStop installed: 18.9 MRAD Field of View: 24.0' - 4.7' @ 100 yds Eye Relief: 3.4" Length: 15.2" Weight: 25.0 oz