Eotech 512 vs. Eotech 518 – An in-depth comparison


The Eotech 512 and Eotech 518 riflescopes are nearly identical sights, and having one may very well be like having the other. However, there are subtle variances that cause them to perform differently. Below is a detailed comparison.

A lot of thought and consideration goes into the development of various equipment, and one of the features that stands out is ease of use. Manufacturers go a long way to ensure that devices are as ergonomic as possible. While most people don’t pay much attention to the position of controls on a riflescope, they do not particularly recognize how important they are, especially during high intensity activity. This is largely what sets the Eotech 512 and Eotech 518 apart, along with several other features.

What are the differences between the Eotech 512 and the Eotech 512?

Eotech 512
Eotech 518
Red Dot Size
1 MOA, 68 MOA ring
1 MOA, 68 MOA ring
Objective Lens Diameter
Brightness Adjustment Levels
20 levels
20 levels
Reticle Color
Battery Life
2,500 hours
2,500 hours

Eotech 512 vs. Eotech 518 – How do they differ?

Optical Features

The Eotech 512 and Eotech 518 are ideally made to be used in short and medium range applications, and they are at home in shooting ranges where the target is still and out in the wild where targets are fast moving.

The Eotech 512 is fitted with a 22mm diameter objective lens which comes with a conveniently wide angle of view. In addition, this lens features a clever build that ensures maximum light transmission and minimal glare. Its 1 MOA reticle size is ideal for high precision shooting, and it covers a size of 1 inch on the target from a distance of 100 yards. For high precision, the lens is made to have minimal parallax, and it also offers unlimited eye relief. This way, keeping your eye on the target becomes easy. The 68MOA ring comes in handy during close range shooting, and it also accords users high precision for targets that are closer than 50 yards.

The Eotech 518 follows suit in similar fashion, bringing with it a 22mm objective lens that is made using glass and laminate for enhanced strength and durability. For a red dot, it presents a 1 MOA reticle and an additional 68 MOA ring that can be used independently. Also a non-parallax lens, you can be certain that target acquisition will be easy and accurate. The lens is also created to offer unlimited eye relief that guarantees exact measurements where targets are concerned.

Since the Eotech 512 and the Eotech 518 have exact optical features, neither is ranked above the other in this regard.  

Overall Performance

Scopes are largely made to be used in multiple environments, and lighting is not always guaranteed to be enough. For this reason, the Eotech 512 comes with up to 20 brightness adjustment levels for helping you with target acquisition. On a normally lit day, you are likely to use level 12. The main downside to this scope is that it does not support Night Vision, meaning that you will not be able to use it in the cover of dark. Its controls are set on the back, a characteristic that many users find inconvenient since you have to block your view as you change settings.

Just like the Eotech 512, the Eotech 518 also comes with 20 brightness adjustment features, but it also does not support Night Vision. This makes it only ideal for day use. On the plus side, its controls are placed on the right side, allowing for easy settings adjustments without necessarily having to block your line of vision. This feature is however, mostly favorable to ambidextrous people who can use both hands easily.

Since the Eotech 518 comes with its control panel on the side, it makes for a better scope than the Eotech 512 scope.  


To be able to sustain high impact and extremely hard conditions, the Eotech 512 is constructed using rugged aluminum. This gives it the ability to handle multiple rounds of recoil without shattering. Additionally, it comes with multiple O-rings which make it entirely waterproof and dustproof. On top of this, the Eotech 512 does not form internal fog, a guarantee that your vision will remain clear all through. You will notice that this device is quite small, bearing a length of 5.6 inches along with a weight of 11.5 oz.

The Eotech 518 comes with a similar build, spotting an aluminum outer casing. This gives the scope the capacity to handle heavy impact with grace. To keep it from being damaged by water, this scope is fitted with multiple O-rings that seal off all joints to keep water from penetrating through. it I also dust proof and keeps from forming fog internally. Just like the Eotech 512, it has a 5.6 inches length and a weight on 11.5 oz.

Both devices bear similar constructional features, setting them on equal footing in this regard.

Battery Life

A scope’s battery life is one of its most significant features, especially for persons who go hunting in the wild for weeks and moths at a time. This is why thee scopes’ battery live comes as something of a disappointment.

The Eotech 512 comes with a battery life of 2,500 hours which is a bit decent. However, most competitors in its caliber come with 30,000 to 50,000 hours of battery life.

Similarly, the Eotech 518 comes with a similar battery life, delivering a maximum of 2,500 hours. This is a bot disappointing, and you may have to carry a backup battery with you in case you are going off for a long time.

The Eotech 512 and Eotech 518 have similar battery lives, giving them similar rating in this respect.  

Eotech 512 vs. Eotech 518 – A comparison overview

Eotech 512 Overview

EOTECH 512 Holographic Weapon Sight
  • EOTECH 512.A65 - Holographic Weapon Sight in black with 68 MOA ring & 1 MOA dot reticle
  • Mount - Compatible with both 1" Weaver and MIL-STD 1913 Rails
  • Adjustable Brightness - The 512 has 20 brightness settings for use in any lighting scenario
  • Water Resistant - The 512 is water resistant to 10 feet (3m)

Even though this device is quite small, it delivers quite the performance punch for both recreational and professional users. With its 22mm lens and wide field of view, target acquisition becomes easy peasy. This feature is supported by unlimited eye relief to give you a seamless experience.

With its 20 brightness adjustment settings, you will have an easy time using it even where light intensity is low. It does not, however, support Night Vision. For optimal performance, it is made to be fully water and dust proof. You will also not experience any form of disturbance from internal fog thanks to internal O-rings which keep it dry in the inside.

Its 2,500 hours battery is a bit decent, but you may have to carry backup, especially if you have to be away for weeks or months.


  • Small and light
  • Impressive optics
  • Water, dust and fog proof


  • Short battery life
  • Does not support night vision

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Eotech 518 Overview

EOTECH 518.A65, Holographic Weapon Sights, 1 MOA, Not Night Vision Compatible, Black, Length: 5.60"
  • EOTECH 518.A65 - Holographic Weapon Sight in black with 68MOA ring & 1 MOA dot reticle
  • Mount - Quick Detach lever fits 1" Weaver and MIL-STD 1913 Rails
  • Adjustable Brightness - The 518 has 20 brightness settings for use in any lighting scenario
  • Side Button Operation - Ideal for use with a G33 Magnifier

Just like the Eotech 512, the Eotech 518 is also a small and light device that is ideal for both short and mid-range shooting. It features a 22mm objective lens made using glass and laminate for maximum light transmission.

For brightness adjustments, it comes with 20 levels ideal for different light intensities. However, it does not support Night Vision, making it only ideal for daytime use. Its casing is made using aluminum that makes it hardy and able to withstand heavy impact. In addition, this scope is water, dust and fog proof, making certain that your vision stays crisp and clear all the time.

The main downside to this scope is its incredibly short battery life, delivering only 2,500 hours.


  • Small and light
  • Comes with 20 brightness adjustment settings
  • Water, dust and fog proof


  • Does not support night vision
  • Short battery life

View Price on Amazon

Verdict: So, which one is better – Eotech 512 or Eotech 518?

Looking through the specs and even practicality of these scopes, it is difficult to pick one above the other. However, since the Eotech 518 comes with side controls, it makes for faster and easier adjustments without having to obstruct your view. This characteristic makes it a better scope than the Eotech 512.


  1. What battery type does the Eotech 512 use?

It uses either a CR123 or an alkaline battery.

  1. Can I use the Eotech 518 reticle when it is not powered on?

No, it has to be powered on.

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Terrence Miller
Terrence Miller is a hunter by birth, picking it up from a lineage of hunters and will probably hand the skill down to his son. He has been hunting since he was a young boy and has knowledge of both the new and old hunting equipment. This goes to say that the information provided is very reliable and conclusive. Using the hunting rifles and getting the right hunting gear seems to be a challenge for many individuals who want to learn the skill of hunting. And the reason why the information presented by Miller has detailed coverage on the different types of rifles, and rifle scopes. When not in the wild hunting, Miller loves horseback riding.


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