This updated favorite hands an unfair advantage to shooters who seek to keep the upper hand in every situation from close quarters to long-range shots. The illumination dial is cleanly integrated into the side focus adjustment knob for easy access and streamlined performance. The glass-etched reticle offers shooters highly functional, intuitive, and detailed hold points, yet remains uncluttered for optimal viewing and features 10 intensity levels with off positions between each setting. Hash-marked ranging reticle using MOA or MRAD based subtension lines for ranging, holdover, and windage corrections. XD(TM) Lens Elements - Extra-low dispersion (XD) glass increases resolution and color fidelity, resulting in crisp, sharp images. XR(TM) Fully Multi-Coated - Proprietary coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. First Focal Plane Reticle - Scale of reticle remains in proportion to the zoomed image. Constant subtensions allow accurate holdover and ranging at all magnifications. Glass-etched Reticle - Protected between two layers of glass for optimum durability and reliability. Illuminated Reticle - Provides precise aiming under low-light conditions. Tube Size - 30 mm diameter. Single-Piece Tube - Maximizes alignment for improved accuracy and optimum visual performance, as well as ensures strength and waterproofness. Aircraft-Grade Aluminum - Constructed from a solid block of aircraft-grade aluminum for strength and rigidity. Waterproof - O-ring seals prevent moisture, dust and debris from penetrating the riflescope for reliable performance in all environments. Fogproof - Argon gas purging prevents internal fogging over a wide range of temperatures. Shockproof - Rugged construction withstands recoil and impact. Hard Anodized Finish - Highly durable low-glare matte finish helps camouflage the shooter's position. ArmorTek - Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. Tactical-Style Turrets - Exposed turrets provide fast, accurate and easily read elevation and windage adjustments. RZR Zero Stop - Zero Stop mechanism prevents the turret from dialing below sight-in range. Precision-Force Spring System - Uses premium components in the erector-spring system to ensure maximum repeatability and ease of adjustment. Precision-Glide Erector System - Uses premium components in the zoom lens mechanism to ensure smooth magnification changes under the harshest conditions. Radius Bar - Fiber optic turret rotation indicator provides a highly visible and tactile point of reference for turret rotations. US Patent 7,937,879 Fast Focus Eyepiece - Allows quick and easy reticle focusing. Built-In Accuracy Features - Matching (MRAD or MOA) turrets and reticles facilitate fast and accurate shooting at extended ranges. The patented fiber optic Radius Bar visually assists tracking turret rotations. US Patent 7,937,879