Holosun EPS Vs Holosun 507C

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I’m here to put two popular models head-to-head: the Holosun EPS Vs Holosun 507C. 

I took these two Holosun models out for a spin, each with its own set of promises and potential. We’re talking about days of testing, countless rounds, and different lighting conditions. 

And let me tell you, it’s been quite a ride. I aim to figure out which one of these bad boys comes out on top.

Will the full-sized, enclosed design of the EPS steal the show, or will the open reflex style of the 507C shine through? It’s all about seeing which sight not only talks the talk but walks the walk.

So, buckle up as we dive into this detailed comparison and find out which one deserves the crown in the world of red dot sights.

FeatureHolosun EPSHolosun 507C
DesignEnclosedOpen Reflex
Reticle2 MOA Dot2 MOA Dot & 32 MOA Circle
Battery Life50,000 Hours50,000 Hours (Solar Failsafe)
Construction7075 Aluminum, IP68 Rated7075 Aluminum
Weight0.09 Pounds1.5 oz
Window Size0.63×0.910.63×0.91
Adjustment per Click1.5 MOA1 MOA
W&E Travel Range±30 MOA±50 MOA
Shake Awake TechYesYes
Multilayer GlassYesYes

Overview of Holosun EPS

The Holosun EPS is a full-sized, enclosed handgun sight known for its crystal-clear aspheric lens and ultra-low dot height.


  • Aspheric lens for clear sight picture
  • Ultra-low dot height for iron sight compatibility
  • 650nm Red Super LED, 2MOA dot
  • 12 reticle intensity settings
  • Up to 50,000-hour battery life from a 1620 cell
  • 7075 aluminum construction, IP68 dust, and waterproof
  • Shake Awake technology
  • Multilayer reflective glass
  • Red 2 MOA Dot reticle
  • 1x Magnification, Parallax Free & Unlimited Eye Relief
  • Multi-Coating on lenses
  • CR1620 Battery
  • 0.63×0.91 window size
  • Weight: 0.09 Pounds
  • Adjustment per Click: 1.5 MOA; W&E Travel Range: ±30 MOA

Overview of Holosun 507C

The HS507C X2 is an open reflex optical sight designed for full-sized pistol applications, boasting a Red Super LED and various advanced features.


  • 2 MOA Dot & 32 MOA Circle reticle
  • 650nm light wavelength
  • Parallax Free with Unlimited Eye Relief
  • 1x Magnification
  • Multi-Coatings on lenses
  • Solar & Battery power sources
  • CR1632 Battery type
  • 50,000 hours of battery life
  • 10 DL&2 NV brightness settings
  • 0.63×0.91 window size
  • Dimensions: 1.78×1.15×1.15 inches
  • Weight: 1.5 oz
  • 7075 T6 Aluminum housing
  • Anodize surface finish
  • Adjustment per Click: 1 MOA; W&E Travel Range: ±50 MOA
  • MRS: Circle Dot, 2 MOA Dot, 32 MOA Circle
  • 12 Brightness Settings: 10 DL & 2 NV Compatible
  • Convenient Tray Battery Compartment
  • Parallax-free & Unlimited Eye Relief

Features Comparison: Holosun EPS Vs Holosun 507C

1. Lens Quality and Clarity

Holosun EPS

During my field tests, the aspheric lens of the Holosun EPS really stood out. The sight picture was crystal clear, like looking through high-quality glass. It was particularly noticeable when I was shooting in varied lighting conditions; the clarity remained consistent. 

What’s more, the ultra-low dot height was a game-changer for aligning with factory iron sights. It made target acquisition faster and more intuitive, especially in rapid-fire scenarios.

Holosun 507C 

The Holosun 507C, with its open reflex design, also delivered impressive clarity. The lens quality held up well, but in direct sunlight, I noticed a slight difference compared to the EPS. 

The 507C’s lens is robust and provides a clear picture of sight, but it seemed a bit more susceptible to glare. This wasn’t a deal-breaker, but in a side-by-side comparison, the difference was noticeable.


The Holosun EPS edges out here, particularly for its aspheric lens that maintains clarity across all lighting conditions.

2. Battery Life and Power Management

Holosun EPS

The EPS’s battery life is impressive. With up to 50,000 hours from a CR1620 battery, it’s on par with the best. But the real standout feature is the Shake Awake technology. 

During my test, the sight powered down automatically when not in use and instantly reactivated with the slightest movement. This feature not only extends battery life but also ensures the sight is always ready when you need it.

Holosun 507C

The 507C matches the EPS in battery longevity, but it has an ace up its sleeve: the Solar Failsafe. I found this particularly useful during long outdoor sessions.

Even if the battery starts to wane, the solar panel provides a backup power source, ensuring uninterrupted operation. The Shake Awake technology is also present, offering the same benefits as the EPS.


It’s a tie. Both sights excel, but the 507C’s Solar Failsafe gives it a slight edge in outdoor conditions.

3. Durability and Construction

Holosun EPS 

The 7075 aluminum construction of the EPS is solid. During testing, it handled recoil and general wear and tear without any issues. 

However, the problem with the battery tray falling out after around 600 rounds, despite using thread locker, is a concern. This might be a deal-breaker for those who demand absolute reliability in all aspects.

Holosun 507C 

The 507C also sports a 7075 aluminum housing, offering comparable durability. Throughout the testing phase, it held up remarkably well. The convenient tray battery compartment was sturdy and showed no signs of wear or potential for malfunction. 

For shooters with smaller hands, though, powering down the sight might be a bit of a challenge due to the button size.


The Holosun 507C takes the lead, mainly due to the EPS’s battery tray issue. For a sight, reliability is key, and the 507C delivers on this front.

4. Ease of Use and Ergonomics

Holosun EPS

Using the Holosun EPS in the field felt smooth and natural. The ultra-low dot height made transitioning from iron sights a breeze, and the interface was intuitive. Adjusting the reticle intensity was straightforward, and I didn’t face any hiccups. 

However, the issue with the battery tray falling out was a bit of a letdown. It’s not a deal-breaker, but it does raise concerns about long-term reliability and ease of maintenance.

Holosun 507C 

The 507C was equally user-friendly, but its advantage lies in the solar power backup. It’s a practical feature, especially in situations where battery life might be a concern. 

Adjusting settings was simple, though, as someone with average-sized hands, I did notice the challenge of shutting off the sight, as it requires pressing both buttons simultaneously. For shooters with smaller hands, this could be a bit of a hassle.


Holosun EPS takes the lead, thanks to its more reliable user interface and fewer ergonomic challenges, despite the battery tray issue.

5. Reticle Options and Versatility

Holosun EPS

The EPS offers a straightforward, no-nonsense 2 MOA red dot. It’s crisp, clear, and effective for most shooting scenarios. However, it doesn’t offer the versatility of a multi-reticle system. For shooters who prefer simplicity and a single, reliable point of aim, the EPS excels.

Holosun 507C

The 507C steps up with its Multi-Reticle System (MRS), offering a 2 MOA dot and a 32 MOA circle. This versatility allows for quicker target acquisition in close-quarters scenarios and more precise aiming at longer distances. 

The ability to switch between reticles on the fly adds a level of adaptability that can be crucial in varied shooting conditions.


Holosun 507C wins here, thanks to its multi-reticle system providing more options and flexibility to the shooter.

6. Weather Resistance and Environmental Adaptability

Holosun EPS

The EPS’s IP68 dust and waterproof rating stood out during testing. It handled various environmental conditions without any performance dips. 

Whether it was rain, dust, or humidity, the EPS remained reliable and consistent. This level of resilience is crucial for shooters who find themselves in diverse and challenging environments.

Holosun 507C

The 507C also boasts solid construction and weather resistance, thanks to its 7075 aluminum housing. However, during testing, I found that in extremely wet conditions, the open reflex design of the 507C was slightly more susceptible to elements than the enclosed EPS. It still performed well, but the EPS had a slight edge in harsher weather.


Holosun EPS takes the lead, with its superior weather resistance and adaptability to more challenging environmental conditions.

Pros & Cons of Holosun EPS


  • Enclosed design with aspheric lens for clear sight picture.
  • Ultra-low dot height compatible with most iron sights.
  • 50,000-hour battery life from a CR1620 cell.
  • Shake Awake technology for battery conservation.
  • IP68 dust and waterproof rating.
  • Multilayer reflective glass for optimal light transmission.
  • 1.5 MOA adjustment per click offers precise control.


  • Battery tray issues around the 600 round mark even with thread locker.

Pros & Cons of Holosun 507C


  • Open reflex design with a 2 MOA Dot & 32 MOA Circle reticle.
  • Solar Failsafe in addition to battery power.
  • 50,000-hour battery life from a CR1632 cell.
  • Multi-Reticle System (MRS) for versatility.
  • Parallax free with unlimited eye relief.
  • Durable 7075 Aluminum housing.
  • Convenient tray battery compartment.


  • Difficulty in powering down the sight for individuals with smaller hands.

Similarities Between Holosun EPS & Holosun 507C

  • Both use 650nm light wavelength for their reticles.
  • Both offer parallax-free viewing with unlimited eye relief.
  • Each provides a battery life of up to 50,000 hours.
  • Both sights have a 7075 T6 Aluminum housing with an anodized finish.
  • Each features Holosun’s Shake Awake technology.
  • Both sights offer 1x magnification.

Differences Between Holosun EPS & Holosun 507C

  • EPS is a full-sized, enclosed design, while 507C is an open reflex sight.
  • EPS uses a CR1620 battery, whereas 507C uses a CR1632 battery.
  • EPS has a 2 MOA dot only, while 507C offers a 2 MOA Dot & 32 MOA Circle.
  • 507C includes a Solar Failsafe feature, not present in the EPS.
  • EPS has a W&E Travel Range of ±30 MOA, compared to ±50 MOA in the 507C.
  • Adjustment per click is 1.5 MOA in the EPS, 1 MOA in the 507C.
  • EPS is slightly lighter at 0.09 pounds compared to 1.5 ounces for the 507C.

Final Verdict & My Choice

After extensive testing and careful consideration, I’ve reached my verdict. The Holosun 507C emerges as the winner in this comparison. 

While both sights demonstrate outstanding performance and reliability, the 507C’s versatility, with its multi-reticle system and the added benefit of solar failsafe, really sets it apart. 

Its adaptability in various shooting scenarios, combined with its user-friendly design, makes it an exceptional choice for a wide range of shooters. 

The EPS certainly has its strengths, particularly in lens clarity and weather resistance, but the 507C’s overall package of features and functionality makes it my top pick.


What is the difference between EPS and 507?

The main difference is that the EPS is an enclosed emitter red dot sight, offering a contained system with two lenses, while the 507 is an exposed emitter optic.

Do Holosun 507K and EPS carry the same footprint?

Yes, the Holosun 507K and EPS have the same footprint, sharing the mounting standard and bottom surface design with other optics in the K series.

What is the difference between Holosun EPS and carry EPS?

The main differences are the window size and adapter plates. The EPS Full Size has a larger window and an RMR Adapter Plate, while the EPS Carry has a smaller window and an RMSc adapter plate. The EPS Full Size is better suited for larger pistols.

What is the difference between Holosun 507C and 507 comp?

The 507 Comp has a larger window, a different reticle, and lacks solar failsafe and auto brightness options compared to the 507C X2. The 507 Comp is designed for competition shooting, while the 507C X2 is more suited for everyday carry.

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