EOTECH 518 Problems You Should Know

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I’m here to talk about my hands-on experience with the EOTECH 518 Reflex Sight. Let me tell you, I’ve put this sight through its paces out in the field. 

It’s been an interesting journey, to say the least. During my time using it, I stumbled upon a couple of issues that seem to be pretty common with this model.

In this article, I’m going to give you the lowdown on these EOTECH 518 Problems and offer practical advice on how to tackle them. 

Battery DrainageRegularly change batteries; remove batteries when not in use.
Astigmatism IssuesUse distance glasses instead of regular shooting glasses to correct reticle distortion.

EOTECH 518 Issues & Their Solutions

1. Battery Drainage 

Let’s talk about the battery drainage issue with the EOTECH 518. Now, from my own experience, this sight can be a bit of a power hog. 

You’re out there, lining up your shot, and suddenly, you notice the reticle dimming. Yep, it’s the batteries dying quicker than you’d expect. I’ve found this especially true during extended use. It’s not just a minor inconvenience; it can really disrupt your shooting session.

This rapid power consumption seems to stem from the design of the sight itself, which, while top-notch in performance, doesn’t quite hit the mark in battery efficiency. Trust me, there’s nothing more annoying than having your sight go dim in the middle of an important shot.


Now, onto the solutions. The first one is pretty straightforward: change the batteries more often. It sounds simple, but it does the trick. Keep a stash of fresh batteries handy, and you’re good to go. However, there’s another trick I’ve learned. 

When you’re not using the sight, just pop the batteries out. This prevents any unnecessary power drain and extends the battery life significantly. It’s a small step, but it makes a big difference. 

By adopting these strategies, I’ve managed to keep my EOTECH 518 running efficiently without the constant worry of losing power at crucial moments.

2. Problem with Astigmatism

Astigmatism, a common eye condition, can be a real pain when using the EOTECH 518. I learned this the hard way. Here’s the deal: if you have astigmatism, the reticle might appear blurred or distorted. 

This isn’t a flaw of the sight itself; it’s all about how our eyes perceive the light emitted from the holographic display. When I first used the EOTECH 518, I noticed the reticle seemed fuzzy. 

It was confusing and a bit frustrating, especially when trying to aim precisely. I realized this issue was more pronounced for me than for others, and it boiled down to my slight astigmatism. This distortion can significantly impact your shooting accuracy, turning an otherwise great experience into a challenging one.


Here’s the solution that worked for me: using distance glasses instead of regular shooting glasses while using the sight. It sounds like a small change, but trust me, it makes a world of difference.

The distance glasses help correct the distortion caused by astigmatism, making the reticle appear sharp and focused. This adjustment improved my aiming accuracy immensely. 

Some other Common Problems

1. Bulky AA Batteries

One issue that caught my attention with the EOTECH 518 is its bulkiness due to the AA batteries. These batteries are placed laterally in the sight, which definitely adds to its overall size. 

When I first mounted it on my firearm, the added width was quite noticeable. This isn’t just about aesthetics; it’s about practicality. The increased size can take up valuable rail space, which might be needed for other accessories. 

2. No Night Vision Compatibility

This was a bit of a letdown, especially when I ventured into low-light conditions. The thing is a lot of shooters, myself included, sometimes need to operate in environments where light is scarce. 

The EOTECH 518, although excellent in standard lighting, falls short here. Without night vision compatibility, the sight’s effectiveness drops significantly in darker settings. 

This isn’t just about convenience; it’s about functionality and safety, too. 

Alternatives to the EOTECH 518

1. Vortex AMG UH-1 Gen II

The Vortex AMG UH-1 Gen II stands out with its virtually indestructible design and clear optics. It boasts a dedicated night-vision button and an efficient power management system for extended battery life.

2. EOTech EXPS2

An upgrade to the traditional EOTech design, the EXPS2 offers quick target acquisition with a more compact footprint. It features easy-to-adjust side buttons and an adjustable, bright reticle for better visibility in various light conditions.

3. EOTech 512

A classic and popular model, the 512 is known for its reliability and simplicity. It’s designed for shooters who want the performance of EOTech’s holographic sights without the need for night-vision compatibility.

Final Verdict

After thoroughly testing the EOTECH 518 Reflex Sight, I’ve concluded that while it does have its challenges, it remains a reliable option once these issues are addressed. 

The battery drainage can be managed with regular changes and removing batteries when not in use. Astigmatism issues are resolved by using distance glasses. 

Overall, with some adjustments and understanding of its limitations, the EOTECH 518 proves to be a dependable sight for various shooting conditions.


Is ACOG better than EOTECH?

In terms of durability, glass quality, magnification options, and illumination longevity, ACOG surpasses EOTech. Plus, ACOG offers a lifetime warranty.

Are Eotechs waterproof?

Yes, EOTECH Holographic Weapon Sights (HWS) are water-resistant, with varying submersion capabilities depending on the model.

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