This high-quality optic gives you an unfair advantage in both close- and long-range targeting thanks to the XR fully multi-coated Extra-low Dispersion (XD) Glass and second focal plane EBR-4 Reticle. The XD glass delivers enhanced resolution and color fidelity, resulting in crisp, sharp images. The XR anti-reflective multi-coating takes it to the next level, enhancing light transmission significantly. Factor in the EBR-4 SFP illuminated reticle with 10 brightness levels, and you have all the makings of world-class glass. 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, resulting in crisp, sharp images Light transmission is increased with XR anti-reflective fully multi-coated optics on all air-to-glass surfaces Second Focal Plane Reticle is glass-etched between two layers of glass for durability and reliability with the illumination knob integrated into the side focus adjustment The 30mm tube is constructed of a single piece of aircraft-grade aluminum for maximum strength, alignment, improved accuracy and visual performance Argon gas purging and O-rings seals prevent internal fogging and keeps moisture, dust and debris from penetrating the scope and affecting performance The hard anodized finish is a highly durable low-glare matte finish ArmorTek coating prevents scratches, oil and dirt from damaging the external glass Exposed tactical-style turrets provide fast, accurate and easily read elevation and windage adjustments. RZR Zero Stop mechanism prevents the turret from dialing