
Viper 6.5-20x50 PA
Dead-Hold BDC Reticle | 30mm Tube


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Viper 6.5-20x50 PA Riflescope
Effortlessly shrugging off recoil, moisture and darkness! The Viper's status as a premium riflescope won't be as easy to shake. Discover a riflescope with incredible performance features like premium, fully multi-coated optics, heavy duty Precision Force spring systems and the glass smooth Precision Glide erector system—delivering all this and more at a price that should have pulled a few more hundreds from your wallet than it did.
- 6.5-20x50 riflescope is ideal for long range, predator/varmint, and target applications.
- Dead-Hold BDC reticle has a customized design that helps eliminate guesswork on hold-over and windage corrections. Good for any hunting or shooting at varying ranges where estimating hold-over would be a concern.
- Side knob parallax adjust allows quick and easy parallax adjustments with range numbers visible while in the shooting position.
- 30mm main tube offers improved windage and elevation adjustment along with greater strength.
- Tall capped turrets allow quick and easy field adjustments.






Magnification | 6.5-20 x |
Objective Lens Diameter | 50 mm |
Eye Relief | 3.1 inches |
Field of View | 17.4-6.2 feet/100 yards |
Tube Size | 30 mm |
Turret Style | Tall capped |
Adjustment Graduation | 1/4 MOA |
Travel per Rotation | 12 MOA |
Max Elevation Adjustment | 65 MOA |
Max Windage Adjustment | 65 MOA |
Parallax Setting | 50 yards to Infinity |
Length | 14.4 inches |
Weight | 21.6 ounces |
Product Manual (PDF) | Download |
Product Manual 2 (PDF) | Download |
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 | 6.5-20 x |
Objective Lens Diameter | 50 mm |
Eye Relief | 3.1 inches |
Field of View | 17.4-6.2 feet/100 yards |
Tube Size | 30 mm |
Turret Style | Tall capped |
Adjustment Graduation | 1/4 MOA |
Travel per Rotation | 12 MOA |
Max Elevation Adjustment | 65 MOA |
Max Windage Adjustment | 65 MOA |
Parallax Setting | 50 yards to Infinity |
Length | 14.4 inches |
Weight | 21.6 ounces |
Product Manual (PDF) | Download |
Product Manual 2 (PDF) | Download |
Viper 6.5-20x50 Dimensions

Lengths | |||||
L1 | L2 | L3 | L4 | L5 | L6 |
14.4 | 2.8 | 2.2 | 6.4 | 4.7 | 3.2 |
Heights | |
H1 | H2 |
2.27 | 1.72 |
Dimensions measured in inches.

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.
Subtension detail for the Viper 6.5-20x50 PA riflescope with Dead-Hold BDC reticle. >
Read the Dead-Hold BDC Reticle manual for details on using the reticle for bullet drop compensation and wind drift compensation and ranging.
Why do you sell Mil reticles with MOA turrets? Why does NF or any other manufacturer? I'm not being rude, just a serious question. I don't understand so looking forward to your reply. Thanks in advance, Jon Gunn
Ive been attempting to install this scope on my ar10 with your cantilever mounts. Whenever I get the scope level the crosshairs are slightly canted. I can't seem to get it right. When I straighten the crosshairs it is off level. What causes this?
What rings would I need for a howa 1500 in 6.5 creedmoor. With the vortex viper 6.5 -20 x 50'
What ring setup or ring height would you recommend for a AR10 flat top?
What size rings are recommended for Viper 6.5-20x50 PA on a Thompson Center Compass 300 Win Mag with no rail? Thank you for your time.
I have a Aero Precision Ar10 rifle with Ultralight 30mm SPR Scope Mount pushing 2inch forward with a Viper 6.5x20x50 do you have any mounting tips
does it have zero stop
Ill be remounting this optic on a Ruger precision which has a 20 Moa mount. I have it already mounted to a 20 Moa quck release. Is 40 Moa too much?
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For optics with an outside diameter of 1.6 to 1.8 inches.
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Mounts 0.87 inches (22.09 mm) from base to center. Sold two per package.
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Vertically align the reticle crosshair on a 30 mm riflescope tube.
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