Nearly since their inception, EOTech holographic sights have been one of the dominant choices in rifle optics. While no EOTech could ever be considered a bad choice for your next rifle, with so many different options to choose from in their lineup, it can be hard to figure out which model is best for you.
EOTech holographic sights are a unique type of reflex sight that uses a laser diode filtered through a series of reflectors and filters to generate a true holographic image, instead of just projecting a dot onto a lens like red dot sights. This method of generating the reticle ensures a true parallax-free image, in addition to being generally less distorted for users with astigmatism. These sights are well-known and much loved for their iconic reticle, which is composed of a 68 MOA outer circle and one or more inner red dots. The outer circle serves as a faster, less precise aiming tool for close-range target engagement. The bottom edge of the circle can even be used as a holdover at very short ranges.
Each EOTech sight is offered with several options for reticles, most of which are based on the 68 MOA circle and 1 MOA inner dot design. Users have the choice of one, two, or four inner dots.
EOTech Models: A Comprehensive Overview
To help you navigate the EOTech lineup, here's a breakdown of the most popular models:
- EXPS- The flagship model of EOTech’s current holographic sights, the EXPS features a toolless QD mount for easy installation or rapid removal and creates a lower 1/3rd cowitness with standard iron sights.
- XPS- This model is identical in most respects to the EXPS, with the exception that the XPS does not feature a QD mount but offers a true cowitness with standard irons. Additionally, the XPS series uses rear-mounted buttons to manage settings and power levels, whereas the EXPS uses side-mounted buttons.
- 512/552- The 512 and 552 are nearly identical, slightly older models of EOTech’s holographic design. These models are powered by common AA batteries and are consequentially larger than the EXPS and XPS series, which use modern CR123A batteries. Both models are cross-bolt mounted and offer an absolute cowitness with standard iron sights.
- 518/558- These sights are in most respects the same as the 512 and 558, except that the 518 and 558 offer the same toolless QD mount as the EXPS series.
Key Features to Consider
As we mentioned earlier, the choice boils down to three essential features. Some users also prefer the QD function for peace of mind, as it allows the sight to be rapidly removed in the event of a failure. EOTech sights that feature QD mounts will offer a lower 1/3rd cowitness, meaning that standard height iron will be visible only in the lower portion of the optic’s window, rather than aligned with the reticle, as in an absolute cowitness. The increased height of a lower 1/3rd cowitness also allows the window of the optic to better clear certain laser aiming devices, such as the PEQ-15.
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However, if you do not intend to use any sort of aiming laser and do not require QD functionality, a cross-bolt mounting EOTech may be preferable. Many users find the rear-mounted buttons difficult to use in conjunction with a magnifier. AA batteries have the advantage of being one of the most common battery types in America, making it exceedingly simple to find replacements. The AA-powered EOTech models also benefit from longer run times than the CR123A models. As CR123A batteries slowly become common in both firearms accessories and general electronics, they are also becoming easier and easier to find at stores, even those that do not specialize in batteries or electronics.
Night Vision Compatibility
Night vision compatibility is probably the easiest attribute to evaluate-either you need it, or you don’t. If you have night vision or plan on getting it in the future, you should opt for a compatible EOTech. Night vision compatibility in an EOTech sight is simply a setting that reduces the brightness level of the reticle. Without this compatibility mode, even the lowest setting on your EOTech will be far too bright under night vision and will wash out everything around it.
For example, the EOTech XPS3 is Night Vision compatible. For non-Night Vision compatible units see the XPS2 sights.
EOTech XPS3 Features:
- Shortest model sight yet! This sight is smaller and lighter than the other HWS sights and runs on a single 123 battery.
- With the new single battery configuration, the XPS allows more rail space than ever, leaving more room for rear iron sights, magnifiers or NV mount. Smaller, lighter and always fast; the XPS series is a great compact option for your platform.
- Single transverse 123 battery to reduce sight length
- Shortened base only requires at most 2 3/4 inch of rail space
- Battery cap and latch are eliminated and replaced with a simple O-ring, tethered cap; better sealing is achieved
- Average battery life at brightness level 12 is roughly 600 hours
Here's a simple table summarizing the key features of different EOTech models:
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| Model | QD Mount | Battery Type | Night Vision Compatibility | Cowitness |
|---|---|---|---|---|
| EXPS | Yes | CR123A | Yes | Lower 1/3rd |
| XPS | No | CR123A | Yes (XPS3) / No (XPS2) | Absolute |
| 512/552 | No | AA | No | Absolute |
| 518/558 | Yes | AA | No | Lower 1/3rd |
EOTECH Holographic Sights Explained (2025 Product Lineup)
EOTech makes an exceptional reflex sight, one that has been used by police and military forces and civilians alike nearly since its invention. Whatever model you pick, you can rest assured that you’ve made an excellent choice.
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