The Viper HS-T is ideal for a wide range of shooting applications. This riflescope is built on an ultra-strong 30mm one-piece machined aluminum tube to deliver increased windage and elevation travel and optimal adjustment. An advanced optical system highlighted with a 4x zoom range provides magnification versatility. A forgiving eye box with increased eye relief gets shooters on target quickly and easily. Extra-low dispersion (XD) glass increases resolution and color fidelity, resulting in crisp, sharp images. Precise, repeatable and durable tactical windage and elevation turrets built specifically for dialing the integral hashmark-based reticle. Constructed from a solid block of aircraft-grade aluminum for strength and rigidity. Recommend mounting with Hunter 30mm Riflescope Rings Medium Height (#18456) for most hunting rifles. Recommend mounting with two extra-high (1.46") Strikefire Tactical 30mm Rings (#18451) on Ruger Precision Rifle® and other AR-style rifles. Made by Vortex®.