Vortex Viper 6.5-20x50 PA Riflescope Effortlessly shrugging off recoil, moisture and darkness! The Viper"s status as a premium riflescope won"t be as easy to shake. Discover a riflescope with incredible performance features like premium, fully multi-coated optics with 95 percent light transmission, heavy duty Precision Force spring systems and the glass smooth Precision Glide erector system—delivering all this and more at a price that should have pulled a few more hundreds from your wallet than it did. * 6.5-20x50 riflescope is ideal for tactical, long range, predator/varmint, and target applications. * Mil Dot reticle is useful for helping estimate range, windage and bullet hold-over. Good for long distance shooters and hunters who need the ranging ability. The Mil Dot subtensions are accurate at 14x. * Side knob parallax adjust allows quick and easy parallax adjustments with range numbers visible while in the shooting position. * 30mm main tube offers improved windage and elevation adjustment along with greater strength. * Tall capped turrets allow quick and easy field adjustments. Optical Features XD Lens Elements Extra-low dispersion (XD) glass increases resolution and color fidelity, resulting in crisp, sharp images. XR Lens Coatings Vortex proprietary XR fully multi-coated lens coatings increase light transmission for maximum brightness. Construction Features 30 mm Tube Allows greater windage and elevation adjustment travel along with greater strength compared to the one-inch tube. One-Piece Tube Maximizes strength and waterproofness. Aircraft-Grade Aluminum Premium grade of aluminum, valued for fatigue resistance. Precision-Force Spring System Uses premium components in the erector-spring system, ensuring maximum repeatability and ease of adjustment. Precision-Glide Erector System Uses premium components in the zoom lens mechanism, ensuring smooth magnification changes under the harshest conditions. Waterproof Optics are sealed with o-rings to prevent moisture, dust, and debris from getting inside the binocular. Fogproof Barrels are filled with argon gas to inhibit internal fogging. Shockproof Lenses are locked in place, fore and aft, with machined locking rings to remain in perfect alignment and withstand recoil and impact. Hard Anodized Finish Hard-coat anodization is durable; the low-glare matte helps camouflage the shooter’s position. ArmorTek