Banner
Title

Diamondback 3-9x40

Dead-Hold BDC Reticle | 1 Inch Tube

Diamondback 3-9x40 Click to Enlarge
SKU: DBK-01-BDC
Alt Views
Thumbnail
Thumbnail
Thumbnail
Thumbnail
MSRP: $269.99
*Prices in US Dollars
Reviews:
Diamondback 3-9x40 is rated 4.9 out of 5 by 91.
  • y_2018, m_6, d_19, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_91
  • loc_en_US, sid_DBK-01-BDC, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_vortex-optics
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getAggregateRating, 11.02ms
  • REVIEWS, PRODUCT


Compare

Select a product to compare with the product you are currently viewing.

Select a Model
Build Your Own Custom Turret

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.
  • 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
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
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.
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
Product Manual 2 (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.

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 3-9x40 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 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 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 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 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 Glass Better price This was my first scope purchase. I researched a lot and picked this for my deer hunting rifle. I was able to harvest my first deer and it worked perfectly especially for east coast ranges (0-300 yards) I also target shot sub MOA a couple of times and now moved it over to my plinking rifle in 22LR as I moved out west and needed to move up to the Diamondback HP in 4-16-42. Great compact easy to use riflescope. would get again or recommend. Also impressed my friends with MUCH more expensive glass at the range....
Date published: 2017-06-15
Rated 5 out of 5 by from Very good low budget scope I searched for a couple of months for a low power scope that would ft my needs. I have a similar Nikon scope. The Diamondback is cheaper. The reticle is more precise. Both scopes have BDC reticles. I prefer the Vortex. The viewing area around the reticle is more open and the reticle itself is less confusing when you trying to make those quick reference long distance shots. This scope is definitely worth more than the asking price. Vortex has set the bar high for scopes under 0 with the Diamondback.
Date published: 2017-06-15
Rated 4 out of 5 by from Best Entry level scope hands down I mounted this on my Marlin 17HMR. Originally I had a BSA Sweet 17 scope on it, but I am switching all my optics to Vortex. I really did enjoy my Sweet 17 scope, but the Diamondback scope's glass and construction are far superior than the BSA Scope. With the BSA scope I was knocking down prairie dogs at 100-200 yards, but with the Diamond back I am out to 300 yards. I have target shot with it at 500 yards and ringing 24" square steel. If you're on a tight budget this is the best scope you can get!
Date published: 2017-06-15
  • y_2018, m_6, d_19, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_91
  • loc_en_US, sid_DBK-01-BDC, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_vortex-optics
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getReviews, 6.32ms
  • REVIEWS, PRODUCT

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

Hello I just purchased a Henry single shot rifle in 223/556. I was wondering which Diamondback scope you might recommend, The 3-9x40 or the 4-12x40 bdc

Asked by: tim67
Those are both great options. The decision would come down to how much magnification you will need.
Answered by: Graham at Vortex Optics
Date published: 2018-04-20

What’s primary difference between Crossfire II and Diamondback 3-9x40 scopes? There’s a gap. Precision glide erector system? Also, is one better for slug guns and why? Thanks!!

Asked by: Slug gun guy
The Diamondback has a better optical system that will give it better clarity, resolution and low light performance. For a shotgun you might want to keep in mind that the Crossfire II 3-9x40 will have more eye relief than the 3-9x40 Diamondback.
Answered by: Mike at Vortex Optics
Date published: 2018-04-12

Hello, I just bought a Diamondback 380 in an AR platform. Is this a good scope for the rifle? and what mounting rings should I get. Thanks

Asked by: Sam22
The Diamondback 3-9x50 will work great on your rifle, you will want to use one of our 1" cantilever mounts to get proper scope height and placement.
Answered by: Mike at Vortex Optics
Date published: 2018-04-04

I am buying a savage 17HMR. Is this to much scope for that rifle? Any suggestions on other scopes?

Asked by: dwarrior67
This scope would work great on your rifle, choosing the right scope really comes down to how you plan on using the rifle and what you are looking for in your optic. Give us a call at 800-426-0048 ext 5 if you would like to discuss further.
Answered by: Mike at Vortex Optics
Date published: 2018-03-26

I have a mossberg 930 with the cantilever barrel. What should I use to mount this scope?

Asked by: I. B. Gunnin
I recommend a set of our 1 inch medium height Pro Rings for your setup.
Answered by: Mike at Vortex Optics
Date published: 2018-03-12

Would this scope work on a Mossberg MVP 6.5 creedmor 

Asked by: Kennywhite
The Diamondback would work great on your rifle.
Answered by: Mike at Vortex Optics
Date published: 2018-01-17

What is the thread pitch for a sunshade

Asked by: Sutty
The thread pitch is M45x0.6-6H on this scope.
Answered by: Mike at Vortex Optics
Date published: 2017-12-08
  • y_2018, m_6, d_19, h_19CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_47
  • loc_en_US, sid_DBK-01-BDC, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_vortex-optics
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 13.44ms
  • QUESTIONS, PRODUCT
Defender™  Flip Cap

Defender™ Flip Cap

The last flip cap you will ever need.

MSRP: $29.99

Buy Now: $19.99
Defender™  Flip Cap

Defender™ Flip Cap

The last flip cap you will ever need.

MSRP: $29.99

Buy Now: $19.99
Pro 1-Inch Rings

Pro 1-Inch Rings

High Height
Mounts 1.03 inches (26.16 mm) from base to center. Sold two per package.

MSRP: $79.99

Buy Now: $54.99
Pro 1-Inch Rings

Pro 1-Inch Rings

Medium Height
Mounts 0.88 inches (22.35 mm) from base to center. Sold two per package.

MSRP: $79.99

Buy Now: $54.99
Flip Cap Optic Cover

Flip Cap Optic Cover

Size 6
For optics with an outside diameter of 1.8 to 2.2 inches.

MSRP: $12.99

Buy Now: $8.99
Pro 1-Inch Rings

Pro 1-Inch Rings

Low Height
Mounts 0.78 inches (19.81 mm) from base to center. Sold two per package.

MSRP: $79.99

Buy Now: $54.99
Flip Cap Optic Cover

Flip Cap Optic Cover

Size 5
For optics with an outside diameter of 1.6 to 1.8 inches.

MSRP: $12.99

Buy Now: $8.99
Hunter 1-Inch Rings

Hunter 1-Inch Rings

High Height
Mounts 1.22 inches (31mm) from base to center. Set of two rings.

MSRP: $24.99

Buy Now: $19.99
Bubble Level

Bubble Level

Vertically align the reticle crosshair on a 1-inch riflescope tube.

MSRP: $49.99

Buy Now: $34.99
Hunter 1-Inch Rings

Hunter 1-Inch Rings

Medium Height
Mounts 0.87 inches (22mm) from base to center. Set of two rings.

MSRP: $24.99

Buy Now: $19.99
Hunter 1-Inch Rings

Hunter 1-Inch Rings

Low Height
Mounts 0.63 inches (16mm) from base to center. Set of two rings.

MSRP: $24.99

Buy Now: $19.99
Sure Fit Riflescope Covers

Sure Fit Riflescope Covers

Protective riflescope cover fits scopes measuring 12 to 14 inches.

MSRP: $29.99

Buy Now: $19.99
Fog Free Lens Cleaning Kit

Fog Free Lens Cleaning Kit

Safe for all lenses.

MSRP: $9.99

Buy Now: $6.99
Fog Free Field Kit

Fog Free Field Kit

All you need for keeping your optics clean.

MSRP: $24.99

Buy Now: $19.99
Torque Wrench Mounting Kit

Torque Wrench Mounting Kit

Tighten to the specified torque and not a bit more.

MSRP: $89.99

Buy Now: $69.99
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getReviews, 42.56ms
  • REVIEWS, PRODUCT
  • bvseo-msg: HTTP status code of 404 was returned;