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Vortex Venom vs Burris Fastfire 3 – Comparing these two popular Red Dots

The Vortex Venom and the Burris Fastfire III are both red dot sights. Take a look at what we found out to decide which one is right for you.

Burris Fastfire 3 vs Vortex Venom

Vortex Venom Overview

The Vortex Venom is a high-quality red dot sight. It features a clear sight picture, and it has a multicoated lens. The housing is low profile and rugged at the same time, and it offers a wide field of view for target acquisition. It provides a battery life of 150 hours on the highest setting and up to 30,000 hours on the lower settings. Besides, it is reliable in all weather conditions, as it is fogproof, shockproof, and waterproof. 

This Vortex Venom sight offers 10 different illumination settings in manual mode, or you can switch to automatic. This ensures that you can accommodate light changing throughout the day. It has unlimited eye relief for rapid target acquisition, and it is considered Parallax free. It is a single-piece chassis that is lightweight and compact, and it has a matte anodized finish to resist corrosion, rust, and other wear. It has an Amortek coating on the lenses. It is strong and durable and protects the lenses against scratches, oil, and dirt. 

The reticle is a 3 MOA Dot, a daylight bright red dot that is easy to see, and you can see your target in any background or lighting. You get rapid target acquisition with precise points of aim. The power and dot intensity controls are on the left side of the sight, making them easy to use. You also can use the auto-brightness mode, which controls dot intensity using its ambient light sensor. Vortex offers a lifetime warranty, and they will take care of you if you have any trouble with the sight. 

This sight is beneficial for sub-gun and rifle platforms when you are using them beyond five yards. It is versatile and easy to use. It is lightweight and compact, and it places controls in convenient locations. It is rugged and built to last, and they back it up with a lifetime warranty. 

Vortex Optics Venom Red Dot Sight
Vortex Optics Venom Red Dot Sight

Check here for a comparison of the Vortex Venom and Viper red dots!

Burris Fastfire III Overview

The Fastfire III is the best-selling red dot sight from Burris. You can use it as your primary sight or place it on top of another sight. It is lightweight and rugged, and it allows you to see a crystal clear red dot on your target, so you gain accuracy and speed right away. It has an automatic brightness sensor that adjusts to match the conditions of the environment. 

The Burris Fastfire 3 has battery access located on top of the sight, and there is an automatic time-out feature that will kick in after eight hours. Your battery should last up to five years. You can get it with the Picatinny/Weaver Mount or without a mount for use on rifles, handguns, tactical shotguns, and more. Its 1x magnification allows aiming with both eyes open, which helps with accuracy and target acquisition. It is Parallax free for better target acquisition, and it has windage and elevation adjustments and three manual brightness settings. 

The lens is made with high-grade optical glass, and it provides excellent brightness and clarity. It also has index-matched, Hi-Lume multicoating, which eliminates glare and offers low light performance. It is waterproof and shockproof, and it comes with a lifetime warranty. The 3 MOA Dot works well with rifles and provides pinpoint accuracy with a smaller dot. The larger 8 MOA Dot is more popular with people who use handguns and shotguns and shoot short range. 

The Fastfire III has a frame made of stainless steel, bronze, and anodized aluminum, making it very strong and durable. It can be mounted onto just about any weapon, and it has unlimited eye relief. It offers a vast field of view and a special reflective coating between the two lenses, protecting them from abrasions or scratches. The outside lens surfaces are fully coated, so you get the maximum light transmission. It is sealed to make it waterproof and submersible.

Burris Fastfire III Red Dot Sight
Burris Fastfire III Red Dot Sight

Commonalities Between the Vortex Venom and the Burris Fastfire III

These two red dot sights are two of the best optics on the market. They both have a red dot color, and both are available in 3 MOA. They are both 1.9 inches long, and they are similar weights; the Burris Fastfire III is slightly heavier at 1.5 ounces instead of the 1.1-ounce weight of the Vortex Venom. They both use a CR 1632 battery with similar battery life at comparable settings. They both have side-mounted controls that are easy to access, and both can use the Picatinny or Weaver mounts. 

You can use both sights for shooting five yards or further, and they provide accurate target acquisition. They can be mounted on rifles and sub-guns, and they work equally well for both. Each includes an automatic mode for sensing brightness, and they are both lightweight and durable. They won’t weigh you down when you are out hunting for hours, and they are both built to withstand the tough conditions in all forms of weather. 

Both of these sights are easy to mount on most firearms. They are ideal when you are shooting at further distances, as the dot allows you to have greater accuracy. Both offer speed in the acquisition, and they both provide a clear view. They both have protected lenses with a coating to prevent scratches and abrasions, and they are both popular with many people. 

Differences Between the Vortex Venom and Burris Fastfire III

While there are many similarities between these two sights, there are a few notable differences as well. First of all, the Vortex Venom is 0.4 ounces lighter, noticeable to a seasoned shooter. They each have a similar field of view, but the Vortex Venom does offer a broader view. 

When it comes to the elevation range, the Burris Fastfire III has an elevation range of 115 MOA, while the Vortex Venom has an elevation range of 130 MOA. The Vortex Venom also has a greater windage range, at 100 MOA as opposed to the Fastfire’s 86 MOA. In this category, the Vortex Venom has the advantage. 

These two red dot sights’ battery life is similar, but the vortex Venom has a longer battery life of up to 30,000 hours on the lowest setting. The Fastfire offers five years of battery life. This makes it hard to compare, but the Vortex sight edges out the Fastfire in this category. 

Both sights offer excellent quality. They are rugged, durable, and hold up in all types of weather. The Vortex Venom again has the advantage with its lifetime lens coating warranty. The Vortex Venom also offers 11 illumination settings as compared to the three provided by the Burris FastFire. 

They are the same size, and both have side-mounted ergonomically friendly controls. The Vortex Venom offers a 3 MOA Dot, while the Burris FastFire comes with both a 3 MOA Dot and an 8 MOA Dot. This allows more versatility and an option for people who want to shoot at short range. The larger red dot provides more coverage of the target area. 

Although these two red dot sights are pretty evenly matched, the Vortex Venom has a slight advantage because it has a slightly longer battery life. It is easier to adjust with more illumination options, weighs less, and has a broader field of view. The Vortex Optics Venom RDS is a little more expensive compared to the Burris Fastfire.


The Vortex Venom is designed for use with rifles and shotguns, and people find that it is durable, lightweight, and it does the job well. It is one of the most popular sights on the market. You can use it on pistols, including AR pistols, and it is durable and rugged. It can take a beating and function with the quality you expect. 

The Burris Fastfire III is also lightweight, and it is popular with pistol shooters. Although it is slightly heavier than the Venom, it is light enough that it won’t shift the gun’s balance, and it is a low-profile sight that works well. Besides, it is designed for rifles and shotguns, and it doesn’t disappoint. 

Both sights are incredible for fast target acquisition, and the dot makes it easy to both track moving targets and shift between different targets quickly. They both work well at ranges over five yards. They have multiple settings to work in various lighting environments, and they are easy to use. 

Both sights have true 1x magnification, which means you can keep both eyes open while you are shooting. You will be able to keep a better awareness of what is happening around you. Also, the red dot helps you stay focused on the target. They improve your accuracy and speed when shooting. 


Red dot sights are very popular, and the Vortex Venom and the Burris Fastfire III are great options. They are very similar with a few slight differences.

Both are rugged and durable, and they are lightweight. You can use them on rifles, shotguns, and pistols, and they provide fast target acquisition and improve accuracy. The Vortex Venom has a slight advantage when compared head-to-head, but either sight will do the job skillfully in all kinds of weather and conditions.

Burris Fastfire 3 vs Vortex Venom
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Kevin Collins