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Vortex Diamondback 3-9×40 Review: Low Price, High Quality

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Looking for an affordable scope? Well, you have come to the right place, let’s check out Vortex Diamondback 3-9×40 Review.

Buying a scope can be a daunting task, especially if you don’t know where to begin your search. This process can be exceptionally difficult if you are a beginner in this field. The scope we are going to review today, just might be your perfect fit. The Vortex Diamondback 3-9×40 mm riflescope is a low piece, good entry-level scope. You could use it on your hunting expeditions or just for shooting in the range, it’s suitable for all your purposes.

The scope comes in different options of reticle, magnifications, lens sizes and tubes. You get an assortment of V-Plex and Dead-Hold BDC reticles in 1.75-5X32 mm, 2-7X35 mm, 2-7X35 Rimfire, 3-9X40 mm, 3.5-10X50 mm and 4-12X40 mm variants. Basically, Vortex offers you a whole array of magnifications to choose from, to suit your needs. Now, you must be wondering why Vortex?

Vortex is a homebred brand, run by a husband and wife duo. What began a small company now has over 200 employees and thousands of loyal customers. Vortex has risen to fame in the world of firearms and is now almost like a household name with all firearm enthusiasts. Apart from their name, vortex also offers exemplary customer service, warranty and quality. In this review, we will be discussing the Vortex Diamondback 3-9×40 mm riflescope.

In a Nutshell

In a hurry to hunt? Here’s a quick overview.

Smile Wide! The Vortex Diamondback 3 is a affordable and easy to use scope. It has a 3x to 9x magnification and a field of view of 14.8′ to 44.6′ at 100 yards. The device also has high recoil tolerance and is durable. You also get a 40 mm objective lens with the scope and a Glide Erector System making it easier for you to change through zooms. The scope is also waterproof and fogproof.

Watch Out! The scope can have poor light transmission sometimes.

Vortex Diamondback 3-9×40 Review

Vortex Diamondback 3-9x40 Review

In this review, we shall cover the features and the characteristics of this low budget, high quality riflescope.


The diamondback 3-9×40 mm aims at giving you the perfect shot. Although, this scope is not exactly a tactical scope, it gives you tactical scope like features and precision. In my opinion, that is a win-win situation. Getting right into the specs of the optics, the glass used is of very high quality and clarity. If you have been a vortex user, this should not come as a surprise to you. Vortex scopes have top of the line glass clarity.

You get two reticle options: a V-Plex reticle and a Dead hold BDC reticle. Both reticles are good in their own ways and can benefit you in the same. Now, the V-Plex reticle is a standard MOA reticle. It is Vortex’s version of a duplex crosshair reticle. It is perfect for those who are into shooting long range and hunting. The Dead hold BDC reticle is a Vortex exclusive reticle which is designed to reduce the guessing that goes into the bullet hold over at long distances.

The reticle is marked with hash marks which helps you centre your objective easily. All you have to do is select the correct hash marks and you’ll have a reliable bullet drop calculation. You can use this reticle for a variety of firearms like rifles, rimfire rifles, shotguns and high power firearms. The hash marks a reference marks on the reticle are extremely useful to calculate BDC in rough weather conditions and while ranging for far off distances.

Both of them are wire reticle in the second focal plane (SFP). SFP lets you focus change magnifications while holding focus on the reticle and your game. You also get a 40 mm objective lens which allows you to get an increased light transmission inside the tube, allowing you to get a brighter and clearer image. The reticle is totally visible even in low light conditions. The field of view is a 100 yards at 14.8 ft to 44.6 ft. The lenses are all multi-coated to give you a clearer and sharper image. The fast-focus eyepiece also allows you to quickly focus in and easily establish your aim.

Magnification & Range

The magnification and range on this scope are pretty accommodating. The magnification on the scope is from 3x to 9x. The scope has a variable magnification that means, you can switch between the various magnification levels and choose what suits your purposes. The device also comes equipped with Vortex’s Glide Erector System. This system uses glass components to make your magnification transition smooth and easy on the eyes.

The BDC reticle allows you to take shots at 100 yards, 200 yards, 500 yards and even at 600 yards. For a 3x to 9x magnification scope, these ranges are pretty good. Again, the Glide Erector System paired with the clarity of the scope also give you a crisp image at 600 yards which is the maximum ranging. You also get an adjustable parallax with the scope. The adjustable parallax removes any scope of optical illusion. The parallax setting at 100 yards. The scope also gives you a decently generous eye relief of 3.3 inches.


Although the scope is not a conventionally tactical scope, it does have tactical adjustments. Vortex scopes are known for their easy, adaptable and user-friendly adjustments. The parallax adjustments are at a 100 yards. You also get smooth magnification adjustment, thanks to the Glide Erector System. The turrets on the scope are capped and low profile. The turrets are all tactical and easily movable. Both, elevation and windage adjustments are at 70 MOA. The travels per rotation at 12 MOA. The adjustment graduation is at 1/8th MOA. Overall, the adjustments on the scope are very user friendly.

User Friendliness

Let’s begin with the build of the scope. Like any other Vortex Scope, you don’t have to worry about the quality of the diamondback is also impeccable. The device is made out of aircraft-grade aluminium, the highest quality of the scope that you can get. The scope is multi-coated and gets retailed in a rather glorious, matte black. The tube is filled with argon gas which protects the internal parts of the scope and reduces any damages that can happen due to weather changes.

The lenses are also multi-coated and are made to reduce glare and infarction of light and give you a clear image. The tube of the scope is made out of a single piece of aluminium and is hard anodized. Overall, this increases the durability and quality of the scope. The Vortex Diamondback is also waterproof and fogproof.

The scope has a 40 mm objective lens. The large nature of the lens allows you to get a greater amount of light transmission and increases the brightness of the reticle. This increases visibility in low light conditions. You also get two reticle options: a V-Plex reticle and a Dead hold BDC reticle. Both reticles are carefully constructed and engineered to maximize your user experience. You also get an eye relied of 3.3 inches throughout magnifications and powers.

The field of view is 14.8 ft to 44.6 feet at 100 yards which is very good compared to a lot of other scopes n the market that fall in the same price range. The exit pupil is at 13.3mm to 4.4mm and you also get an elevation click value at 0.250 MOA. The scope comes with no illumination but the large objective lens and the other features of the scope make up for it.

The instruction manual that comes with the scope is one to reckon with. It has comprehensive and easy to understand date in it that will surely help enhance your shooting experience. Along with this you also get the reputed VIP warranty. The Vortex VIP warranty ensure coverage of damages for an unlimited period of time. Basically, it’s an unlimited lifetime warranty and this warranty is also transferrable. So, if you were to sell the scope you don’t have to worry about the warranty.


The Vortex Diamondback 3 is compatible with multiple rifles including high calibre rifles, AR rifles, muzzleloader and shotguns. You can use around 1-inch mounting rings and Picatinny rails to mount this scope onto your firearm.


  • Affordable
  • Clear Lenses
  • Precise Reticles
  • Two Reticle Options
  • Waterproof
  • Fogproof
  • Durable
  • Anodized
  • Glide Erector System
  • Easy to Use Turrets
  • Generous Field of View
  • Vip Warranty


  • Scope Has Minor Issues with The Parallax Sometimes
  • Light Transmission Is Poor at 9x Magnification


Are the turrets are capped?

Yes, the turrets on this scope are capped. Do check this video on different types of turrets.

Can you adjust the turrets with your fingers?

Yes, the turrets are capped and easily adjustable. You do not need to use a coin or any kind of tools to make these adjustments. They are smooth and finger movable and are smooth.

What warranty does this scope have?

The riflescope comes with a VIP unlimited lifetime warranty. Under this, damages to the scope are covered and the warranty is also transferrable.


To conclude, I think it is safe to say that this scope has most of the features of a high-end Vortex scope. It is affordable, under $200 scope, and has some exceptional features. Most scopes in this price range don’t come with these features and quality. If you are looking for a low price device with high-quality features, this is your way to go. Since you’re checking Vortex scopes, why don’t you check out Best Scopes for Remington 700. I’ve included some of my favorite Vortex Scopes.

On top of all the features of the device you also get to benefit from the Vortex VIP warranty. There is no question that VOrtex has some of the best products on the market but it also has some of the best customer service. Yes, the scope has some minor drawbacks but the features and the price outweigh these flaws. If affordability is your go to, you don’t have to think twice.

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