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Diamondback 3-9x40

V-Plex Reticle | 1 Inch Tube

Diamondback 3-9x40 Click to Enlarge
SKU: DBK-M-01P
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MSRP: $269.99
*Prices in US Dollars
Reviews:
Diamondback 3-9x40 is rated 4.9 out of 5 by 91.
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Diamondback® 3-9x40 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.

  • 3-9x40 riflescope is ideal for big game, muzzleloader, and slug shotgun applications.
  • V-Plex reticle is the single best all-purpose hunting reticle intended for a wide variety of hunting applications.



VIP Warranty Argon Purged Waterproof
Magnification3-9 x
Objective Lens Diameter40 mm
Eye Relief3.3 inches
Field of View44.6-14.8 feet/100 yards
Tube Size1 inch
Turret StyleCapped
Adjustment Graduation1/4 MOA
Travel per Rotation15 MOA
Max Elevation Adjustment70 MOA
Max Windage Adjustment70 MOA
Parallax Setting100 yards
Length11.7 inches
Weight14.4 ounces
Product Manual (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.
Magnification3-9 x
Objective Lens Diameter40 mm
Eye Relief3.3 inches
Field of View44.6-14.8 feet/100 yards
Tube Size1 inch
Turret StyleCapped
Adjustment Graduation1/4 MOA
Travel per Rotation15 MOA
Max Elevation Adjustment70 MOA
Max Windage Adjustment70 MOA
Parallax Setting100 yards
Length11.7 inches
Weight14.4 ounces
Product Manual (PDF)Download

Diamondback 3-9x40 Dimensions

Lengths
L1 L2 L3 L4 L5 L6
11.7 2.0 2.1 5.4 3.0 3.1
Heights
H1 H2
1.89 1.69

Dimensions measured in inches.

V-Plex Reticle (MOA)

A popular all-purpose hunting reticle intended for a wide variety of hunting applications.

Subtension detail for the Diamondback 3-9x40 V-Plex Reticle. >

Rated 5 out of 5 by from Awesome Quality! I have owned and throughly abused my diamondback 3-9x40 for about 4 years; its been rained on countless times, dropped as a result of sling malfunctions, its been frozen solid in -30(-22F), and even covered in mud from being strapped onto ATV's. I am thoroughly impressed. The glass on my diamondback is clear as day, the magnification ring is smooth, and aside from exterior scratches and scuffs the scope has held up wonderfully and is always bang on when it counts. Being a student this scope was at the top of my price range but DEFINITELY worth every dime. I have nothing but good to say about it. Vortex has gained a costumer for life.
Date published: 2018-03-08
Rated 5 out of 5 by from An Awesome Scope At An Awesome Price! The Diamondback series of optics is what got me hooked on Vortex. It started with the binos and led to scopes. My 3-9x40 with v-plex reticle is currently on my muzzleloader. This scope has withstood the recoil as well as being bumped and knocked around a little in the deer woods. The clarity of glass is excellent in this price point and even better than some above. The Diamondback is a basic no frills scope that just does what it needs to do. It's clear, holds zero, has positive/repeatable adjustments, and it can take some abuse. If you want a riflescope that you can rely on for your hunt without breaking the bank then the Diamondback is your answer.
Date published: 2017-06-15
Rated 5 out of 5 by from Diamondback 3-9x40 what a great scope! I recently came across a diamondback 3-9. And went a head and pulled the trigger on it. I am so glad I did because after sighting it in and shooting with the optic what an amazing scope the quality is there and for the price what a deal! I have no complaints about the scope and the quality of it. It by far has amazed me. I for now on will always go to vortex. I only wish I would have gotten vortex before my other optics because what a difference on many levels. If you are concerned about the diamondback 3-9x40 have no worries it is so worth it! I can only imagine how vortex’s higher class scopes are.
Date published: 2018-03-07
Rated 5 out of 5 by from Great "working man" scope! I have deer hunted my whole life. I have used countless scopes by countless manufacturers. Between hunting and my job as a police officer there is not another brand i trust more than Vortex. I have a few different models specific to certain task but one of my favorites is my diamondback. For all around use it is great, clear, good in low light, durable and cost effective. A lot of folks cant afford to drop 1k$ on a scope and it sure is nice to have a scope and company that you can trust for a fraction of that price. Coming from a blue collar man that enjoys the outdoors, Vortex is who i trust.
Date published: 2017-06-15
Rated 5 out of 5 by from Great Value Scope I purchased the 3-9x40 Diamondback for my Ruger American 308 rifle. I have lots of experience with other Vortex product, so I came back once again to get glass for my new Ruger. The Diamondback features a smooth adjustment ring and quality turrets that track well. Glass quality is excellent for the price level. This is one of those scopes that carries a relatively low price tag,but I know when I take it out of the box and mount it on my rifle its going to be a quality piece. On the rare chance I get a lemon, I know that Vortex's VIP warranty will take care of it. The VIP warranty is one of the things that keeps me coming back again and again and giving Vortex first shot at any of my optics needs. I have since recommended this same scope to 2 other people who have purchased to put on their hunting rifles.
Date published: 2017-06-15
Rated 4 out of 5 by from For inside of 300yrds this scope is great. Finally got to use the scope a few weeks ago zeroes great held zero without any issues. It was a pretty cold morning at the range and I never once had the lenses fog up. Now I'm looking into a longer range scope for a precision ar. And I will definitely be choosing vortex again. Dead hold redicle works great for my AR with .223 factory ammo just read the manual it gave me all the information I needed to calculate distance and how to use proper hold over. Only reason I'm at a 4 is I haven't got to use it any further then 250yrds. I will update when I get a chance
Date published: 2017-06-15
Rated 5 out of 5 by from Great Scope for the price. Bought a Vortex Diamondback 3-9X40 and put it on my Ruger M77 Hawkeye .338Win Mag about 6 years ago and it's held up great with zero issues. I've taken it on many hunts over the years and have been successful. The scope has held up great over the last 6 years in the Alaskan Backcounty.
Date published: 2018-03-01
Rated 5 out of 5 by from Simple Perfect for my .22 mag. Lightweight optic and durable for carrying through the woods on a regular basis. Year and a half later I’ve never had to make and adjustment after initial zero. Glass has never fogged no matter what weather conditions I was experiencing.
Date published: 2018-03-01
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How do the Pro 1" rings compare to the Hunter series rings for mounting a Diamondback 3-9x40 scope to a 50-cal in-line muzzleloader, assuming medium height for both? Is it worth paying twice as much for the Pro rings?

Asked by: kj1852
I would recommend the Hunter rings for a rimfire setup. For your setup, I would highly recommend going with the Pro rings as the machining and tolerances are superior to the Hunter rings. If you decide to go with Hunter rings, they would work best if lapped. Yes, medium height will work.
Answered by: Josh at Vortex Optics
Date published: 2018-10-24

I have a 3-9x40 Diamondback BDC scope to mount on a Traditions Buckmaster in-line muzzle loader that has a 2-piece scope base (I believe Weaver style). What scope rings to you recommend? I was assuming the Pro series, but if so, what height?

Asked by: kj1852
Thanks for the question! I would recommend going with a set of our 1" Pro Rings-Medium for your setup.
Answered by: Graham at Vortex Optics
Date published: 2018-10-23

I have the Dimondback 3x9x40 having problems getting the crosshairs from being blurry. with or without glasses, just can't get that nice solid lines.

Asked by: RED 1
Have you run out of adjustment in your diopter one way? Please give us a call at 800-426-0048 Ext. 5 and we can walk you through the process of adjusting your diopter properly!
Answered by: Josh at Vortex Optics
Date published: 2018-10-15

Will the diamondback 3-9x40 withstand the recoil of a 30-06 rifle? Plan to mount on Remington 700.

Asked by: Mr. Cannoy
Yes, put a quality set of rings on that setup and you won't have any issues.
Answered by: Josh at Vortex Optics
Date published: 2018-10-15

I purchased the diamond back V-Plex reticle, 3yrs back.Very happy with it.I have an upcoming hunt where long range shooting may take place.Could you give me your best guess on what the "posts" in the reticle would be if used like the BDC model? 30.06

Asked by: Spectrum
Awesome, sounds like a great time is ahead of you! Could you please give us a call at 800-426-0048 Ext. 5, we need to know more than just the caliber but we are more than happy to help you!
Answered by: Josh at Vortex Optics
Date published: 2018-08-27

Looking into getting a Savage 220 slug gun. Would the Diamondback 3-9x40 BDC be a good scope for this gun.

Asked by: Dewayne1
Thanks for the question! The Diamondback would be a great choice for your slug gun!
Answered by: Graham at Vortex Optics
Date published: 2018-08-24

I have a Kidd .22 on the way and have the Diamondback 3-9x40 on the short list. Which reticle would be best for a .22 with this scope?

Asked by: DHef
Either the V-plex or the Dead-Hold BDC would be a fine reticle choice for your .22.
Answered by: Graham at Vortex Optics
Date published: 2018-10-13

Putting a new Diamond back 3-9x40 DKM01P on my new Weatherby 308 vanguard series two. Have Weaver mounts 36m (48501) and 35m (48500). What scope ring size should I use? The weaver I" for 42 -44 mm (49042) seem too small for the scope and don't fit right?

Asked by: Byron
I would recommend using a set of our 1" Pro Rings in Medium height for your set up.
Answered by: Graham at Vortex Optics
Date published: 2018-04-30
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