Be practical when you decide to go tactical with a Vortex Diamondback Tactical 4-12x40mm Rifle Scope. This high-performance scope has looks that equal the view you get through the XD High-Dispersion glass with XR Plus fully multi-coated, anti-reflective lenses. The exposed tactical turrets let you dial in quick and precise elevation and windage adjustments with a zero-reset feature and and rotation indicators for a visual reference as well. The Second Focal Plane Reticle and Precision Glide Erector System will have you on target quickly under even the harshest of conditions. With a 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 with holdover and wind drift correction accurate and the highest magnification level The 1 inch tube is constructed of a single piece of aircraft-grade aluminum for maximum strength, alignment, improved accuracy and visual performance Nitrogen gas purging and O-rings seals prevent internal fogging and keep moisture, dust and debris from penetrating the scope and affecting performance The hard anodized finish is a highly durable low-glare matte finish Exposed tactical-style turrets provide fast, accurate and easily read elevation and windage adjustments. The zoom lens mechanism uses a Precision-Glide Erector System to ensure smooth magnification changes under the harshest con