OPTICAL FEATURES
XD Lens Elements	Extra-low dispersion (XD) glass increases resolution and color fidelity, resulting in crisp, sharp images.
XR Fully Multi-Coated	Proprietary coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces.
Second Focal Plane Reticle	Scale of reticle maintains the same ideally-sized appearance. Listed reticle subtensions used for estimating range, holdover and wind drift correction are accurate at the highest magnification.

CONSTRUCTION FEATURES
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.
Capped Reset Turrets	Allow quick re-indexing of the turret (no tool needed) to zero after sighting in the riflescope. Caps provide external protection for turret.
Side Focus	Adjustment located on riflescope's left side and is easily accessible from shooting position. Provides optimal image focus and parallax removal.

INTERNAL MECHANISM DESIGN FEATURES

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.

CONVENIENCE FEATURES
MAG-Bar	Allows rapid, easy changes in magnification.
Fast Focus Eyepiece	Allows quick and easy reticle focusing.

Magnification	3-9 x
Objective Lens Diameter	40 mm
Eye Relief	3.5 inches
Field of View	35.5-12.2 feet/100 yards
Tube Size	1 inch
Turret Style	Capped
Adjustment Graduation	1/4 MOA
Travel per Rotation	12 MOA
Max Elevation Adjustment	92 MOA
Max Windage Adjustment	92 MOA
Parallax Setting	100 yards
Length	12.4 inches
Weight	14.2 ounces

Vortex Viper 3-9x40 Riflescope Dead-Hold BDC MOA Reticle

The Vortex Viper 3-9x40 riflescope is one of the Vortex main riflescope lines. It provides great image quality, deadly precision at long range and ease of handling at a very reasonable price. The parallax adjustment knob is placed on the side of the scope for easy parallax adjustment from shooting position, multi-coated lenses provide bright images even in low light conditions. The Vortex Viper scopes are ideal for long range, predator/varmint, and target applications.

Dead-Hold BDC Reticle

The customized design of this reticle helps eliminate guesswork on hold-over and windage corrections. Good for hunting and shooting at varying ranges where estimating hold-over is a concern.