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. And, like all Vortex scopes, the Viper HD is backed by the legendary Vortex VIP Warranty. This model adds the RevStop Zero System for a fast, reliable return to zero, along with an exposed locking elevation turret for easier in-field adjustments. 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 fidelityFully multi-coated optics for superior light transmissionSFP Dead-Hold BDC (MRAD) illuminated reticleAircraft-grade 30mm aluminum tube100% waterproof, fogproof, shockproofArmorTek ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt0.1 MIL adjustments for windage and elevationRevStop Zero System for a fast, easy, reliable return to zeroLocking exposed elevation turret/capped windage turretVortex VIP unconditional lifetime warrantyKey Specifications Item Number: 741881Magnification: 3-15xObjective Lens Diameter: 44mmReticle: VMR-3 (MRAD) illuminatedFocal Plane: SecondEye Relief: 3.4"Field of View @ 100 yds.: 39.9-8&';Tube Size: 30mmAdjustment Graduation: 0.1 MILMax Elevation Adjustment: 30.5 MRADMax Windage Adjustment: 27 MRADParallax Setting: 20 yds. to infinityLength: 13.2"Weight: 21.5 oz.