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Diamondback 4-12x40

Dead-Hold BDC Reticle | 1 Inch Tube

Diamondback 4-12x40 Click to Enlarge
SKU: DBK-04-BDC
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MSRP: $269.99
*Prices in US Dollars
Reviews:
Diamondback 4-12x40 is rated 4.8 out of 5 by 4.
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Build Your Own Custom Turret

Diamondback® 4-12x40 Riflescope

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.

  • 4-12x40 riflescope is ideal for big game, predator/varmint, muzzleloader, slug shotgun, and long range 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.



VIP Warranty Argon Purged Waterproof
Magnification4-12 x
Objective Lens Diameter40 mm
Eye Relief3.1 inches
Field of View32.4-11.3 feet/100 yards
Tube Size1 inch
Turret StyleCapped
Adjustment Graduation1/4 MOA
Travel per Rotation15 MOA
Max Elevation Adjustment60 MOA
Max Windage Adjustment60 MOA
Parallax Setting100 yards
Length12 inches
Weight14.6 ounces
Product Manual (PDF)Download
Product Manual 2 (PDF)Download
Included in the Box
  • Removable lens covers
  • Lens cloth

Optical Features

Fully Multi-Coated Increases 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 1-inch 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.
Precision-Glide Erector System Uses premium components in the zoom lens mechanism to ensure smooth magnification changes under the harshest conditions.
Capped Reset Turrets Allow re-indexing of the turret to zero after sighting in the riflescope. Caps provide external protection for turret.

Internal Mechanism Design Features

Precision-Glide Erector System Uses premium components in the zoom lens mechanism to ensure smooth magnification changes under the harshest conditions.

Convenience Features

Fast Focus Eyepiece Allows quick and easy reticle focusing.
Magnification4-12 x
Objective Lens Diameter40 mm
Eye Relief3.1 inches
Field of View32.4-11.3 feet/100 yards
Tube Size1 inch
Turret StyleCapped
Adjustment Graduation1/4 MOA
Travel per Rotation15 MOA
Max Elevation Adjustment60 MOA
Max Windage Adjustment60 MOA
Parallax Setting100 yards
Length12 inches
Weight14.6 ounces
Product Manual (PDF)Download
Product Manual 2 (PDF)Download

Diamondback 4-12x40 Dimensions

Lengths
L1 L2 L3 L4 L5 L6
12.0 2.4 2.0 5.6 3.0 3.1
Heights
H1 H2
1.89 1.69

Dimensions measured in inches.

Dead-Hold BDC Reticle

Customized dot design helps eliminate guesswork on holdover and windage corrections. Good for hunting/shooting at varying ranges where estimating holdover is a concern.

Subtension detail for the Diamondback 4-12x40 Dead-Hold BDC Reticle. >

Note
Read the Dead-Hold BDC Reticle manual for details on using the reticle for bullet drop compensation and wind drift compensation and ranging.

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 optics My third diamondback love the optics and warranty
Date published: 2017-08-04
Rated 5 out of 5 by from Great scope I ordered the scope back in February. I put it on an enfield British 303. It's a great scope for the price. The scope works well for my needs
Date published: 2017-07-28
Rated 5 out of 5 by from Great Scope Bought this scope to replace an older model scope I had on another rifle. Couldn't be happier with the results of this product.
Date published: 2017-08-05
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how can I rest my scope's reticle back to it's factory setting. I have had great luck with my Diamond Back scope and put it on a new Tikka T3 in 270. I'm having issues sighting it in now. 

Asked by: CmdrTron
If you put the objective of your scope against a mirror, you will see the reticle and its reflection. You can then adjust the scope until the two line up, this will bring you back to optical center.
Answered by: Mike at Vortex Optics
Date published: 2017-10-18

what is the green dot used for in my scope and how do I use it?

Asked by: Denni
Give us a call at 800-426-0048 ext 5, I am not sure what green dot you are referring to.
Answered by: Mike at Vortex Optics
Date published: 2017-10-16

Can the 4-12x40 diamond back be mounted on a 300 win mag.I was told it can not handle the shock. And will not hold it's accuracy.

Asked by: Thane
The Diamondback 4-12x40 will handle the recoil of your 300 win mag, however it has a relatively short eye relief so that may be something you want to consider. We recommend mounting it in a good quality set of rings at 15-18 inch pounds with no Loctite.
Answered by: Mike at Vortex Optics
Date published: 2017-10-13

Where is this scope made ?

Asked by: Tonyt
The Diamondback HP scopes are manufactured in the Philippines.
Answered by: Mike at Vortex Optics
Date published: 2017-10-09

I have a DBK-04-BDC scope and want to purchase a Sure-Fit cover. The product list says I need a large which starts a 14" but the scope is 12" long. Should I purchase Med or Large? Thanks

Asked by: Badlander
You will want a size medium for your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-10-06

Is it possible to change the original turret caps to adjustable turret caps?

Asked by: blueridgeishome
I do not believe the turret caps can be changed out for adjustable turret caps, but I could be wrong. My Diamondback scopes are on rifles that I do not do much adjusting on. If you are looking for adjustable turrets, I would look at a few of the scopes in the Viper line. I do not think you will be disappointed, but they are more expensive.
Answered by: historyguy
Date published: 2017-09-04

Is there a shade available for this scope?

Asked by: Joejers
We do not make a sunshade for this scope, but www.mkmachining.com makes a universal sunshade that will work.
Answered by: Mike at Vortex Optics
Date published: 2017-08-30
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