Sighttron's S6 5-30X56 ED Riflescope series delivers extreme accuracy at extreme ranges. These optics are available in multiple magnifications and a wide range of reticle options from simple crosshairs to complex bullet-drop compensation grids. All models in the S6 5-30X56 ED family are equipped with Sighttron’s ExacTrack W& E System that provides proper alignment between the adjustments and the erector tube by maintaining the same constant and accurate point of pressure at zero or extreme adjustments, resulting in zero drift. The large oversized tactical knobs are easy to adjust in any weather conditions and are resettable to zero. The new internal zero-stop mechanism provides a tactile and audible positive stop for dead-on zero setting. Like all of Sighttron’s optics, the S6 5-30X56 ED scopes feature an exclusive optical design to reduce chromatic aberrations, improve color accuracy, and deliver excellent light transmission. Optical quality is further enhanced with the Zact-7 Revcoat Plus – a multi-coating process that is applied to both surfaces of the lens for maximum anti-reflection performance and the highest light transmission. Features of the Sightron S6 5-30X56 ED Riflescope: ED Glass Provides Sharp and Crisp Image 5-30X Zoom Engages Medium and Long-Range Targets 34mm Tube, Zero Stop Tactical Turrets, Removable Throw Lever 11-Position On/Off Illumination Dial for Target Acquisition in Any Lighting Waterproof, Shockproof & Fogproof Design for Any Environment Sightron S6 5-30X56ED SFP IR MOA-7 Riflescope 66002