When success rides on the perfect shot, rely on the exceptional versatility and optical performance of the ViperA(R) HD Scope. Ultra-rugged. Remarkably adaptable. Each delivers outstanding image clarity, resolution, and sharpness to ensure your target comes into view with sharp detail. Viper HD also boasts enhanced features for unmatched accuracy at extended ranges while excelling in the low light of dawn and dusk when game is most active. This model features a first focal plane VMR-4 reticle that provides ranging capability and accurate holds at any magnification. This Scope also features the RevStop Zero System for a fast, reliable return to zero, along with an exposed locking elevation turret for easier in-field adjustments. And, like all Vortex scopes, the Viper HD is backed by the legendary Vortex VIP Warranty. 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. HD optical system with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity Fully multi-coated optics for superior light transmission First focal plane VMR-4 (MOA) illuminated reticle provides ranging capability and accurate holds at any magnification Aircraft-grade 30mm aluminum tube 100% waterproof, fogproof, shockproof ArmorTek ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt 1/4 MOA adjustments for windage and elevation Locking exposed elevation turret/capped windage turret Vortex VIP unconditional lifetime warranty Key Specifications Item Number: 741882 Magnification: 5-25x Objective Lens Diameter: 50mm Reticle: VMR-4 (MOA) illuminated Focal Plane: First Eye Relief: 3.4" Field of View @ 100 yds.: 23.6-4.7&'; Tube Size: 30mm Adjustment Graduation: 1/4 MOA Max Elevation Adjustment: 68 MOA Max Windage Adjustment: 42 MOA Parallax Setting: 20 yds. to infinity Length: 15.2" Weight: 25 oz.