When success rides on the perfect shot, rely on the exceptional versatility and optical performance of the Vortex Viper HD 3-15x44mm Riflescope. Built to excel in every hunting application—from predators to big game—the Viper HD delivers outstanding image clarity, resolution, and sharpness. Its HD Optical System uses select glass elements to provide exceptional resolution, cut chromatic aberration, and maximize light transmission for superior low-light performance during dawn and dusk when game is most active. The Second Focal Plane illuminated reticle provides a precise aiming point in low-light conditions. Ultra-rugged and remarkably adaptable, the Viper HD is constructed from a single block of aircraft-grade aluminum and is O-ring sealed and Argon gas purged for superior fogproof and waterproof performance in the most extreme conditions.