Holosun HS510C vs Eotech XPS2

Comparing different sight scan be fun; in fact, it’s always fun because you end up finding all the issues with both by comparing the differences between each.

I compare overall structure size and weight and look at the difference between their power sources and finally check out the accessories that each one offers.

The review will start with a basic overview of each sight, and then I will get down to the actual comparison that comes from using both.

A Comparison Between the Holosun HS510C vs Eotech XPS2

PhotoProductReticleWindow DimensionsDetails
Holosun HS510C HolosunHS510C2MOA Dot & 65MOA Ring0.91” x 1.2”View on OpticsPlanet
EOTECH XPS2 EOTECH XPS20- 68MOA circle with quadrant ticks with 1 MOA aiming dot1.20” x 0.85”View on OpticsPlanet

Holosun HS510C

Holosun HS510C


The Holosun HSC10C is parallax free and provides unlimited eye relief. It is made of a single aluminium body with a titanium alloy lens hood. The single-cell CR2032 battery provides up to 50,000 hours of LED light. The reticle comes in three options, and these are a 2 MOA dot and a 65 MOA ring, and you can have them as Dot only, Ring only, or Dot and Ring reticle combinations. Holosun offers a solar power source so your battery extends its life during daylight hours, and add to this the shake awake technology and you have the most advanced power sources sight on the market.

Holosun HS510C

The optics are multi-coated to provide maximum clarity and brightness, reduce glare and provide an abrasion-resistant surface. The device can be submerged in water and has an IP67 rating.

You get 10 daylight modes and 2-night vision (NV) modes.

Holosun HS510C

This model provides 0.5 MOA click adjustments with a ±50 MOA W&E Travel Range. The compact body can withstand -40℉ – 158℉ Storage Temperature and can operate in a range of -22℉ – 140℉. To top this all off, the device can withstand up to 1000G vibrations.

Physical aspects 3.3” x 1.6” x 1.8” with a central height of 1.41” and a total weight of 8.3 ounces.




The EOTech XPS2 is the most compact model they produce and comes with some interesting features. These include transmission holography powered by a single 123 lithium battery that provides 600 continuous hours at standard room temperature.

This model comes with an auto shut down feature that can be set to 4hrs and up to 8hrs. The power source provides up to 20 brightness settings.


You get unlimited eye relief and fog-resistant optics that can also withstand full submersion of up to 3 meters. This model’s physical dimensions are 3.8” x 2.1” x 2.5” (97 x 54 x 64 mm), and it weighs in at 9 ounces.


The optics are adjustable by 0.5 MOA clicks, and the adjustment range is +/- 40 MOA travel. The window dimensions are :1.20” x 0.85” (30 x 23mm) and are coated with anti-reflection. The field of view is 100 yds (91m): 30 yds (28m) at a 3” eye relief. The reticle options include a Single 1 MOA aiming dot (no outer circle) and 68MOA circle with quadrant ticks with (2) 1 MOA aiming dots. The sight comes with its own 1” (25.4mm) weaver or MIL-STD 1913 rail mount.


As you can see, both devices are totally different, and therefore worthy of a comparison.

Toughness and Durability

In terms of overall toughness and durability, the Holosun 510C is a tough little cookie. To start off with, the sight housing is made of high-strength aluminium, and the lens is protected by a titanium hood. The knobs are streamlined with the housing, so you can damage them from accidental knocking, you do need a small screwdriver or tool to adjust the reticle, and this model is fully waterproof to a depth of 1 meter.

The EOTech XPS2 is also made of high-grade aluminum, but it does not have titanium covers, it uses aluminum all over. Just like the 510C, the knobs are flush with the body, so you don’t need to worry about extremal damage.

Adjustments are also made with a small tool or screwdriver, and this model goes down to 3 meters in the water. The only difference between the two is that the XPST2 underwent the US Military drop tests, so it’s a confirmed military grade device.

In terms of toughness and durability, both provide excellent results, however when it comes to extreme conditions, the XPS2 outperforms the 510C and mainly because the XPS2 is a closed system, while the Holosun is an open one which means; if you get into muddy situations, the mud can cake up the open lens system of the 510C.

The other main difference is that the XPS2 can go down 3 meters, so if you are diving, you might want to consider that as a major difference.

The bottom line for toughness and durability is hands down the Eotech XPS2.

Optics and Reticle

The Holosun 510C optics are clear and crisp; the color is clean, there is no blue or green tint on the reflection. The reticle retains its clarity through all use. The 510C advantage is its 3 reticle options, which are:

2 MOA dot, 65 MOA ring and the 2 MOA dot with a 65 MOA ring around it (Holosun Circle Dot Reticle)

Most people that use sights love the Holosun Circle Dor Reticle since it provides excellent large target acquisition while retaining the 2 MOA dot precision for a small distant target. The way to switch between them is simple, just press the minus button, which you also use for your brightness adjustments.

Now, take note that the unlimited eye relief is important and is a main feature of the Holosun 510C, and you can get a Green version to the red dot which they call the HE510C Elite.

The EOTech XPS2 comes with very clear lenses without the red reflection of standard reflex sights, that’s because it’s a holographic model. With this said, the holographic reticle can appear grainy when taking aim. Grainy is the standard in holographic sights, and this makes it a personal reference rather than a technical glitch.

In terms of the reticle, the XPS2 uses the circle dot. However, the circle dot reticle uses a 1 MOA dot surrounded by a 68 MOA ring. This makes the reticle excellent for close up shots, but it retains its power in for distant targets.

The bottom line is that the 510C is more fluid and clear; the flexibility of choice and how you traverse between the different reticles in the 510C is excellent. The grainy reticle of the XPS2 personally is off-putting, but again, this is a personal viewpoint. So for me the 501C is a stand out winner of the optics and reticle comparison.

Structure and Size

The 510c is 8.3 ounces while the XPS2 is 9 ounces.
The 510C is 3.3” x 1.6” x 1.8” while the XPS2 is 3.8” x 2.1” x 2.5”.

Bottom line: the 510C wins in terms of compact size and weight.

Power Source

The Holosun 510c stands apart in the crowd, not only from the XPS2 but from anyone else. There is no comparison here, the 510C provides solar power with automated transfer between the solar panel and the CR203 battery, add to this its motion detection (shake awake), and you have a 50,000-hour power sourced sight.

The XPS2 uses a 123 Lithium battery for 600 constant hours. This is a no brainer, and the low battery warning light on the XPS2 doesn’t make it any closer in performance.

Bottom line; the Holosun 510C wins outright; it’s the Ironman of the power source.


The Holosun 510C gives you an extra battery tray as well as a small tool for battery tray removal. You also get the Holosun quick detach mount.

The EOTech XPS2 doesn’t come with any accessories, although you will find that its mount can be attached to most Picatinny rails.

Bottom line; not much of a difference really, and this brings me to my overall conclusion:

Both sights are excellent. However, I would consider the EOTECH XPS2 for more adverse and wet conditions over the Holosun 510C. The XPS2 is military-grade, with this stated, for daily civilian use, the Holosun HS510C wins hand down and mainly due to its crazy power source combination and ease of use.

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