Diamondback 4-12x40


Diamondback 4-12x40 is rated 4.8 out of 5 by 454.
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MSRP $269.99


The Diamondback - loaded with features! First, the solid one-piece aircraft-grade aluminum alloy construction makes the Diamondback riflescope virtually indestructible and highly resistant to magnum recoil. Argon purging puts waterproof and fogproof performance on the agenda, and advanced fully multi-coated optics raise an eyebrow when crystal clear, tack-sharp images appear in the crosshairs. Look for all this and more in a riflescope you'd expect to cost quite a bit more-but doesn't. We can live with that.

Build Your Own Custom Turret - Kenton Industries

Diamondback 4-12x40 Dimensions (in inches)
Product Dimensions
L1 L2 L3 L4 L5 L6
12.0 2.46 2.15 5.85 3.0 3.1
H1 H2
1.89 1.69
Magnification 4-12x
Objective Lens Diameter 40 mm
Eye Relief 3.1 inches
Field of View 32.4-11.3 ft/100 yds
Tube Size 1 inch
Turret Style Capped
Adjustment Graduation 1/4 MOA
Travel Per Rotation 15 MOA
Max Elevation Adjustment 60 MOA
Max Windage Adjustment 60 MOA
Parallax Setting 100 yards
Length 12 inches
Weight 14.6 oz
Vortex Lifestyle Image




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.


Tube Size 1 inch diameter tube offers a versatile blend of adjustment, size and weight for a wide variety of shooting applications.
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 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 hard-coat anodization provides a low-glare matte surface and helps camouflage the shooter's position.
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.


Precision-Glide Erector System This system ensures the components in the zoom lens mechanism glide smoothly and cleanly through all magnification ranges.


Fast Focus Eyepiece Allows quick and easy reticle focusing.


Please select Reticle.



Rated 5 out of 5 by from great scope, great price, and yes I own a couple The scope holds up beautifully to heavy recoil. It's clear with easy target acquisition. I recommend that you use the Vortex site to input your load information for your BDC, it'll give you a good idea of the ranges for your BDC. The Vortex warranty is the best on the market. I had smoke damage to a couple scopes, called them up, sent the scopes in, and not only did they replace the scopes but the package came with a couple t-shirts and hand written note. The folks at Vortex went above and beyond with their customer service. They make excellent products and their customer service is the best in the business.
Date published: 2017-06-15
Rated 4 out of 5 by from Good scope. Great warranty! I bought the Diamondback 4-12X40 a few months ago. The clarity is good and the BDC cross hairs are sharp. While the Diamondback might be on the lower end of Vortex's product lines, it is still better than many scopes that cost more. The reason that I so often choose Vortex is their outstanding warranty. I have had to send a broken scope back to Vortex before (my mistake, not theirs) and I have never had a more positive and helpful customer service experience before. They stand behind their superior products. Keep up the good work Vortex!
Date published: 2017-08-06
Rated 5 out of 5 by from Great Hunting Scope I bought this scope because it was in my budget at the time, and I had been working in a long range rifle that I was itching to get out and shoot. Basically I wanted to get some vortex glass to see if I liked it; my plans being to use it for my long range rifle, and then put it on my .30-.30 (which desperately needs an upgrade), and if I liked it I’d buy another vortex with higher power. Well, that’s definitely what’s going to happen, and I’ll be replacing some other old scopes now too. I loved this scope; the turrets are great, it’s sturdy, the zoom and all other focal planes are easy to adjust, and most importantly the glass is clear as can be. I would definitely recommend this scope! It was great for shooting paper, and I’m sure it will be great upnin the mountains next hunting season.
Date published: 2018-03-26
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