The Vortex Viper PST Gen II combines premium XD glass, effective XR lens coatings, and near-bulletproof durability to give you the ultimate advantage in short- and long-range targeting. XD glass increases resolution and color fidelity, resulting in crisp, sharp images. XR full multi-coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. And the ArmorTek ultra-hard, scratch-resistant coating protects all exterior lenses from scratches, oil and dirt. Factor in the EBR-4 MRAD illuminated reticle with 10 brightness levels, and you have all the makings of top-class glass. More on the Illuminated FFP EBR-4 MRAD Reticle Designed to maximize long-distance shooting and ranging abilities, the EBR MRAD reticle can be used to effectively determine ranges, holdovers, windage corrections and moving target leads. Ultra-precision laser etching ensures that MRAD specifications are kept to the tightest tolerances possible. The fine center crosshair subtensions were carefully chosen to provide the optimum balance between precision aiming and low-light visibility. Includes windage reference dots on drop lines. With the Vortex VIP Warranty, you get a Very Important Promise. The Vortex VIP Warranty is about how its handled, not how it happened. Vortex promises to repair or replace a damaged or defective Vortex scope at no cost to you. If your product can not be repaired, it will be replaced. This unlimited Lifetime Warranty is fully transferable and requires no warranty card be sent in or receipt dug out. If you own it, Vortex will handle it, and that's a promise. Extra-low dispersion (XD) glass increases resolution and color fidelity XR anti-reflective fully multi-coated optics on all air-to-glass surfaces First focal plane illuminated EBR-4 reticle with 10 brightness settings 30mm tube is constructed of a single piece of aircraft-grade aluminum Argon gas purging and O-rings seals prevent internal fogging and ke