"The Vortex Optics RZR-2001 Razor Red Dot Sight is a high-clarity, top tier reflex sight that will add high accuracy to your firearm of choice, whether you're shooting during the day or the night. This powerful Vortex red dot sights features XR proprietary anti-reflection lens coatings for exceptional brightness and its exceedingly bright red dot reticles can be seen clearly at all times even with a backdrop of pure sunshine. A premium wide-field lens on the reflex sight gives you an incredibly wide field of view and high edge-to-edge resolution, so you can always be aware of your surroundings. Unlimited eye relief makes the Razor red dot sight easy to use and allows you to acquire targets quickly and accurately.The Vortex Optics Razor XR Coated Reflex Sight has been built with a one-piece chassis that is waterproof and shockproof with a high recoil rating and Vortex Optics has coated the exterior lenses with the scratch-resistant ArmorTek coating that guards from oil and dirt as well as scrapes. This Vortex Razor can run on a single CR 2032 battery for up to a year at the highest brightness setting, so there's a minimum amount of maintenance with the sight.|XR Lens Coatings: Vortex XR proprietary anti-reflection lens coatings increase light transmission for maximum brightness|Waterproof: Optics are sealed with o-rings to prevent moisture, dust and debris from getting inside|Shockproof Construction: High recoil rating|One-Piece Chassis: Maximizes strength and waterproofness with aircraft-grade aluminum alloy chassis. Compact and lightweight|Hard Anodized Finish: Hard-coat anodization is durable; Matte black finish|Parallax Free: Allows for rapid shooting with both eyes open, without concern for parallax shooting error|ArmorTek: Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt|Unlimited Eye Relief: Non-critical eye relief for rapid target acquisition|Battery Life: One year average battery use at highest setting|Export of this product outside of the United States of America is not allowed and is controlled by the US Department of State"