Find the Vortex Optic that is right for you. The Vortex Viper HS riflescopes advanced optical system, highlighted with a 4X zoom range, ensures magnification versatility. A forgiving eyebox with increased eye relief gets you on target quickly and easily. Built on an ultrastrong 30mm one-piece machined-aluminum tube, the Viper HS delivers increased windage and elevation travel for optimal adjustment. Extra-low-dispersion XD glass maximizes resolution and color fidelity, resulting in crisp, sharp images. Vortex proprietary XR fully multicoated lens coatings increase light transmission for the brightness you need in low-light conditions. ArmorTek ultrahard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. Waterproof, fogproof and shockproof construction. Backed by Vortexs VIPunlimited lifetime warranty. 30mm main tube.