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Reviews about this item

Review Summary

2026-01-19T19:00:00

Rated 3 out of 5

decent scope.

decent enough scope, biggest complaint is the tiny little bitty fov you get at more than 10 power. this is basically a 4-10 scope for me because seeing anything at more than 10 is nearly impossible. other than that its a quality scope

dylan

2025-10-13T20:00:00

Rated 5 out of 5

Set your expectations

Scope is appropriate for a first time big game hunter. I put this on a mid priced Savage rifle (. 308). If you're looking to shoot beyond 400 yards this scope is not for you. If your hunting distances include 400 and in, t) 12x will have no issues. My wife shot her first bull elk at 280 yards with one shot. She used the BDC to hold over. Elevation was pretty close to running out when zeroing. Would recommend a 20 MOA rail if you prefer to dial and to avoid running out of elevation .

Jacob N.

2025-10-11T20:00:00

Rated 5 out of 5

Great scope for an entry

Great scope for an entry level scope, it has never failed me

Jordan B.

2025-09-25T20:00:00

Rated 5 out of 5

Clear glass

Mounted on my 270 no issues

Brandon S.

2025-09-23T20:00:00

Rated 5 out of 5

Good Hunting Optic

Gets the job done for white tail

Blake B.

2025-09-10T20:00:00

Rated 5 out of 5

Bang for the buck king!

Definitely a step up over the crossfire line in quality for not a ton more money, worth every penny!

Nathaniel K.

2025-09-03T20:00:00

Rated 5 out of 5

Good Scope

Good scope for the money.

Charles S.

2025-09-01T20:00:00

Rated 5 out of 5

Great scope for the price

Great scope for the price point! My rifle came with a fairly decent scope, but after a few seasons I wanted to upgrade to better glass, slightly higher magnification, and a good BDR. As someone who is going through "adult onset outdoorsmanship", The Vortex Diamondback line is at exactly the right level so that I know it's going to do what I need it to do, and be 100% reliable, without spending $5,000 on all the bells and whistles that I don't know if I'll ever need.

Jonathan S.

2025-07-10T20:00:00

Rated 5 out of 5

Pimped my Ruger 22 Charger

I put this scope on my Ruger 22 Charger and have had a blast shooting from the cheek rest. Fkn surgical!

Bobby

2025-05-02T20:00:00

Rated 5 out of 5

Have several Burris scopes. They're

Have several Burris scopes. They're rugged, durable and all have held zero!

Roger C.

2025-04-20T20:00:00

Rated 5 out of 5

best bang for your buck;

best bang for your buck; i used this scope on a ruger american 22 and it holds zero perfect.

Savanah R.

2025-04-03T20:00:00

Rated 5 out of 5

Great for the $

I replaced an old Weaver with this glass a few years ago. This isn't my typical go-to price range as I usually purchase a much higher priced optic. However, I didn't want to shell out that extra money for something I only use occasionally. This gets the job done well. Holds zero. Bright and clear. Tracks well. Impressive for the price. The Diamondback line packs a lot of value.

Brian M.

2025-03-30T20:00:00

Rated 5 out of 5

Perfect for hunting

Perfect little scope for a hunting rifle. Nothing to crazy all the right features at an awesome price

david k.

2025-03-22T20:00:00

Rated 5 out of 5

Quality scope for the price

Quality scope for the price and warranty. BDC has been very reliable

Joshua M.

2025-02-28T19:00:00

Rated 5 out of 5

Used this to shoot my first deer

I went hunting with this scope. I put it on a mossberg 500. I was using Winchester Sabot Slugs with the expanding tip. Scope was sighted in at 100 yds. I called vortex, and they were able to calculate the trajectory of the slug at distances beyond 100 yds. Each notch below center was about 25 yds. I used the 2nd notch to shoot a deer at approximately 165yds ( i used a range finder). The second notch gave me a perfect broadside shot and got me my first deer. I did this from a tree stand. Absolutely superb scope, high quality coated lenses and I had no problems with fog on the lenses as they are nitrogen purged!

Nikos F.

2024-12-27T19:00:00

Rated 4 out of 5

Vortex make grat scopes for the money.

No only does Vortex make great scopes they stand by there products, no questions asked.

Mark C.

2024-12-26T19:00:00

Rated 5 out of 5

Quality entry level scope

Great field of view and easy to use reticle. For the price, there isn't a better rifle scope on the market. Great for a mid-range rifle need for sportsman.

Matthew E.

2024-11-12T19:00:00

Rated 5 out of 5

Does what you need it to

Purchased this for a Ruger M77 in . 270 several years ago. Glass is great quality for the price, and it has held up well over the years. If you're willing to do the math, the reticle can and will take you past 500 yards. I enjoy how well the hashes work with the trajectory of . 270. Only real complaint is that the turrets are mushy on adjustment, but I'm not moving them frequently so I can put up with it.

Zachary N.

2024-10-19T20:00:00

Rated 5 out of 5

Fantastic scope!

One of the best scopes I've ever used. 10/10

Sherry N.

2024-10-01T20:00:00

Rated 2 out of 5

Eye relief is very bad

Eye relief is terrible. I wish I could return this. It's my first Vortex rifle. Very hard to get off a quick shot while hunting as you're trying to find the perfect spot for eye relief, very frustrating. Would not recommend.

Andrew

2024-09-07T20:00:00

Rated 3 out of 5

About as nice as it's not.

So if you want this specifically for hunting, it will most likely serve you well. The clarity and reticle is good and I have no doubt the scope is durable. Where I have issues with it is the elevation and windage adjustments are straight mush. If you wanna dial up or down you may as well forget about it, they have numbers to indicate how many MOA you've adjusted but I can't feel or hear the actual clicks so it's almost impossible to tell. Also I've noticed on a couple different guns I've had this on or tried mounting it to, I cannot get the eye relief right. The eye relief itself is good, however the dimensions of the scope make it hard to adjust it correctly on the rifle. This scope is about an inch shorter in length than my leupold VX freedom, so to get the same eye relief I have to scoot it further rearward on the gun and then that causes the objective to hit something and now I need taller rings and so on. Overall the scope itself is fine and will do great for a dedicated deer gun which is what I'm using this for now. I do think there's better options for this price range though.

Paden T.

2024-07-14T20:00:00

Rated 5 out of 5

Great scope

It's a bit short for long action a Ruger M-77 without additional base.

Clayton B.

2024-06-19T20:00:00

Rated 4 out of 5

Great scope for the price

I really like the quality for the price point on this scope. No frills or overpriced crap. Vortex also has the absolute best customer service I have ever worked with.

Garrett K.

2024-06-14T20:00:00

Rated 4 out of 5

Great optic for the price.

Great optic for the price. Took a mule deer first shot at about 575 with this scope.

Justin D.

2024-05-18T20:00:00

Rated 5 out of 5

Very nice scope.

Very well made and highly accurate. This will hold the zeroing in adjustments very well. With a lifetime guarantee, you will love this.

Eugene D.

2024-05-15T20:00:00

Rated 5 out of 5

Vortex

Awesome company one of the only companies I trust to use for hunting, sports and shooting.

Justin S.

2024-05-01T20:00:00

Rated 5 out of 5

Bison down

Originally purchased for an 18" .223 wylde my son built. Ended up mounting on a .308 because my son drew a bison tag and that was the biggest round he could shoot comfortably with precision. Worked great on both the .223 wyled and .308 but will stay on the .308 now because it's a proven killer. Works great in interior Alaska in all seasons. We were in and out of cabins, tents, and the truck multiple times from hot to -20F and everything inbetween and had no issues whatsoever. Great Quality.

Jeffrey S.

2024-04-30T20:00:00

Rated 5 out of 5

Clear and Precise optics and

Clear and Precise optics and its can take beating.

anthony h.

2024-04-20T20:00:00

Rated 5 out of 5

Mounted this optic on my

Mounted this optic on my 7mm mag. The diamondback is simple, sturdy, and backed by the Vortex lifetime warranty. What more could you ask for?

Anthony T.

2024-04-05T20:00:00

Rated 5 out of 5

Paired it with .308 for

Paired it with .308 for hunting and works well for use it intended for.

Randy R.

Vortex Optics 4-12x40 Rifle Scope Specifications

  • Magnification

    4x - 12x

  • Objective / Field of View

    40mm / 27.1' (8.3m) @ 4x at 100 yds.(100m), 9.2' (2.8m) @ 12x at 100 yds.(100m)

  • Main (Center) Tube Diameter

    1.0"

  • Objective Tube Diameter

    1.8"

  • Eyepiece Tube Diameter

    1.5"

  • Lens Coatings

    XR Anti-Reflective Fully Multi Coated Optics

  • Reticle

    Dead-Hold BDC

  • Reticle Image Plane (Magnifying)

    Second

  • Exterior Finish

    Matte Black

  • Windage & Elevation Adjustments (MOA)

    1/4-M.O.A. Per Click

  • Maximum Adjustment

    57 MOA W & E

  • Exit Pupil

    Not Specified by Manufacturer

  • Eye Relief

    3.4" / 86.4mm @ 4x, 3.1" / 78.7mm @ 12x

  • Parallax Correction Control

    50 Yards to Infinity, with Side Knob Parallax Adjust

  • Diopter Adjustment

    No Diopter Adjustment

  • Material

    Aluminum Alloy

  • Nitrogen Filled

    Argon Gas

  • Waterproof / Fogproof

    Yes

  • Length

    14.4", (365.8mm)

  • Mounting Length

    6.5"

  • Weight

    16.6 oz., 470.6g

  • Special Features

    Reticle Image in the Second Focal Plane.
    Argon Gas Purging.
    MAG-View Adjustment Lever.
    Pop Up Turrets with Audible Clicks for Elevation and Windage.

7 Accessories for Vortex Optics 4-12x40 Viper Series Riflescope, Matte Black Finish with Dead-Hold BDC Reticle, Side Adjustable Parallax.

  • All Accessories (7)
  • Sights & Accessories (2)
  • Cleaning Accessories (4)
  • Bags & Cases (1)

About Vortex Optics 4-12x40 Rifle Scope

• Shrugging off recoil, moisture and darkness with impunity! The Viper's status as a premium riflescope won't be as easy to shake. Discover a riflescope with incredible performance features like 95 percent light transmission and premium, fully multi-coated optics for stunning detail and color differentiation delivering all this and more at a price that should have pulled a few more hundreds from your wallet than it did.
• x-Factor Vision, Precision optics feature our exclusive XR anti-reflective coatings for exceptional image clarity, and XD premium high-density glass to provide the edge-to-edge sharpness needed to differentiate details at any distance.
• The Viper's Precision-Force Spring System is a patented system that uses an ultra-performance copper alloy / cobalt-beryllium spring. Not only does this greatly increase the fatigue life of the erector support system over more commonly used materials, but changes in spring pressure over time are virtally eliminated because the spring maintains a constant force throughout the entire range of motion. And, most importantly, windage and elevation adjustments are consistently smooth thanks to the spring's resistance to galling against the erector tube.
• The Viper's Precision-Glide Erector System features premium-grade fluoropolymer teflon resin bushings that provide exceptional resistance to stress cracking, temperature change, corrosion, and friction-induced wear. In addition, these bushings have an ultra-low coefficient of friction for the smoothest possible operation of the magnification adjustment.
• Vortex engineered the Viper riflescope to stand the test of time and rough abuse. The solid one-piece main tube of the Viper is incredibly tough and constructed out of 6061 T6 aircraft-grade aluminum. Vortex goes even further and purges the Viper with the highly-prized argon gas, targeting corrosion in an unchallenged way.

Vortex Optics 4-12x40 Rifle Scope Features

  • 4 - 12 x 40 riflescope is ideal for Big Game, Long Range, Predator/Varmint, and Target hunting.
  • Dead-Hold BDC reticle has a customized design that helps eliminate guess work on hold-over and windage corrections. Good for any hunting or shooting at varying ranges where estimating hold-over would be a concern.
  • Side Knob Parallax Adjust provides quick and easy parallax adjustments with range numbers visible while in the shooting position.
  • Argon gas does not absorb or react chemically with water.
    Argon gas eliminates internal fogging.
    Argon gas maintains its protective properties over a wider temperature range.
    Argon gas does not diffuse as quickly as other elements, extending the service life of the optics longer.
  • MAG-View adjustment lever allows rapid, easy changes in the magnification even when you're wearing bulky gloves. Raised, rear-facing numbers make the referencing fast.
  • Fast focus eyepiece is quick and easy to use.
  • Pop-up dials let you easily set elevation and windage back to zero.
  • Audible clicks are easily counted for fast, precise adjustment of elevation and windage.
  • XD (Xtra-low Dispersion) glass objective lens elements of extra-low dispersion glass enhance image resolution and are carefully selected and precision-crafted to exacting standards for true-to-life images of startling clarity and color accuracy.
  • XR coatings deliver incredible image detail with extremely high resolution and light transmission. Fully multi-coated, scratch-resistant coatings eliminate annoying, image-degrading reflections and offer extraordinary brightness for a lifetime of trouble-free lens protection.
  • Export of this product outside of the United States of America is not allowed and is controlled by the US Department of State

Key Features

  • Fast focus eyepiece is quick and easy to use
  • Pop-up dials let you easily set elevation and windage back to zero

What's in the box:

  • Lens Cover & Vortex VIP Lifetime Warranty