2,558 Brands 529 Categories All Departments

Free Express Shipping!

Select Two-Day Shipping and use coupon code 2DAYAIR during checkout to get a free shipping upgrade if eligible! See promotion details

Best Rated Product

Our customers have spoken – this is one of the best rated products in the Rifle Scopes category! See more best rated products

Special offer available for this product. Click here to see!

FREE Expedited Shipping On Select Products

Use coupon code FREESHP to get Free Expedited Shipping on select products. Limited time only. See promotional details.

Government Export Restriction Government Export Restriction
Select a Model
Vortex Diamondback 4-12x40 AO Rifle scopes
$229.99 $349.00 Save 34%
Reticle: V-Plex
Code: VX-RS-DMB4-DBK-412PL
UPC: 875874001824
Vortex Diamondback 4-12x40 AO Rifle scopes
$299.00 $359.00 Save 17%
Reticle: Dead-Hold BDC
Code: VX-RS-DMB4-DBK-412B
UPC: 875874001817
Click to select this item for your bundle offer!
Buy Together & Save Even More!

A great way to save even more money is to purchase complementary products at the same time that you shop for what you want!

In many cases you'll be offered two additional items that you can add to your order and save, but feel free to only pick one if you want - you'll still save

As low as $26998 You Save 34%

Vortex Diamondback 4-12x40 AO Rifle scopes Product Info

Vortex Diamondback 4-12x40 AO Riflescopes with Dead-Hold BDC Reticle or V-Plex Reticle by Vortex For crystal cleal and tack-sharp images, this adjustable objective riflescope allows maximum precision on smaller targets. Vortex Diamondback 4 12x40 AO Riflescope delivers all of the power you need for medium to long range hunting. The Vortex Diamondback riflescope is virtually indestructible with its solid, one-piece aircraft-grade aluminum alloy construction. It's also highly resistant to magnum recoil. Vortex Rifle Scopes with a 4-12x magnification and a 40mm lens is ideal for big game, muzzleloader, slug shotgun, long range and target applications. Vortex knows good hunting gets all the better with high quality optics. The Diamondback 4-12x 40mm AO Rifle Scope by Vortex consists of a rugged, durable 1-inch tube constructed of premium grade of aluminum that is valued for fatigue resistance. Vortex Riflescopes subject all of their riflescopes to demanding factory testing under a force of 1000 G's - 500 times! Not only is this rifle scope waterproof, it is highly prized for its purging with Argon gas. This feature helps to eliminate internal fogging. Vortex Diamonback 4-12x40 AO riflescopes also come with a VIP Unconditional Lifetime Warranty.

Specifications for Vortex Diamondback 4-12x40 AO Riflescopes:

Magnification: 4-12 x
Objective Lens Diameter: 40 mm
Eye Relief: 3.1-3.4 inches
Field of View: 32.4-11.3 feet/100 yards
Tube Size: 1 inch
Turret Style: Low profile
Adjustment Graduation: 1/4 MOA
Max Elevation Adjustment: 60 MOA
Max Windage Adjustment: 60 MOA
Parallax Setting: 10 yards to Infinity
Length: 13.1 inches
Weight: 14.9 ounces

Features for Vortex Diamondback 4-12x40 AO Riflescopes:

  • VIP Unconditional Lifetime Warranty
  • Fully Multi-Coated Lenses Increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces.
  • One-Inch Tube Standard tube diameter for most American riflescopes.
  • One-Piece Tube Maximizes strength and waterproofness.
  • Aircraft-Grade Aluminum Premium grade of aluminum, valued for fatigue resistance.
  • Precision-Glide Erector System Uses premium components in the zoom lens mechanism, ensuring smooth magnification changes under the harshest conditions.
  • Fast Focus Eyepiece Allows quick and easy reticle focusing.
  • Low Profile Turrets Is less susceptible to accidental impact damage.
  • Reset Turrets Allow re-indexing of the turret housing to zero after sighting in the riflescope—generally requires use of a coin or wrench.
  • Adjustable Objective Uses an adjustment mechanism on the objective lens to fine-tune focus for the purpose of reducing parallax shooting error.
  • Waterproof Optics are sealed with O-rings to prevent moisture, dust, and debris from getting inside the binocular.
  • Fogproof Barrels are filled with argon gas to inhibit internal fogging.

Package Contents:

  • Vortex Diamondback 4-12x40 AO Riflescope
  • Removable lens covers
  • Dust cloth

Vortex Diamondback 4-12x40 AO Rifle scopes Related Products

Vortex Diamondback 4-12x40 AO Rifle scopes Comments

Customer Reviews
Helpful Positive Review Diamondback 4x12 AO by PGB, August 11, 2013
Vortex good value. I have been pleased with all my vortex products crossfire, viper and now diamondback. Great warranty but I haven't had to use it. Pros: Scope is very clear, great field of view, BDC is referenced in MOA, focuses down to 10yds Cons:...
3/4 found this helpful
Helpful Negative Review Defective / Inaccurate Objective Bell / Poor Eyebox / The Build & Performance Do Not Match The Price by therock, February 28, 2015
I give two stars, one for the appearance design, and the other for the reticle design. I can only imagine whomever is responsible for “this scope’s” performance does not, or has never used a rifle scope that works as it should. The first sign of tr...
Most Recent Review Vortex Diamondback 4-12x 40 BDC by Mike, March 17, 2015
Execellent scope for the money (as expected from Vortex) dialed in and zeroed at 100 yards in 5 shots or so (I'm not a very experienced shooter so this may be better in experienced hands). Optics Planet's service was great also, they worked with me ...
Most Recent Review Vortex Diamondback Works for Me by Pete, February 21, 2015
I was looking for a mid-priced scope with good glass and a reticle set up which would allow me to shoot various ranges by applying holdover or adjusting my elevation for longer ranges -- I found it. This scope provides me with the reticle set up and...
Most Recent Review DIAMONDBACKS ROCK !!!!!!!!!!! by TOOTY, November 13, 2014
JUST received my second Diamondback and just ordered the Viper model soon to arrive. In the old days scopes of this quality were very expensive and not anymore . I"m so pleased with the clarity , it's staggering to me that ya can get this kind of qua...
0/1 found this helpful
Read All 19 Reviews