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  • Post last modified:January 30, 2024

In this Holosun 507K VS EPS Carry comparison guide. Let's talk about what makes one optic more preferable than the other. I have used both for almost two years, and I have to say that the EPS Carry is my favorite, and the 507K has been collect dust in the armory for a while. Here is why.

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Holosun 507K VS EPS Carry - Main Differences

eps carry vs 507k

The EPS Carry is the smallest enclosed optic red dot available from Holosun. Both come in models with red and green reticles and feature the "shake awake" technology, which puts them to sleep when not in use and wakes them up with motion.

holosun507 k x2 unboxing inside

This feature used to be very popular, but in my personal experience. It's not as useful for concealed carry when its constantly moving on a person because it's always on. Since the battery supposed to last more than 4 years, and I have disabled the shake awake at the start of the testing to see how long the battery will last. 

So far at the time of writing this review, both of them have stayed on using the battery that came in the packaging.

holosun eps carry vs holosun 507k

I have been a Trijicon RMR user since 2011. Back then there wasn't any technology like this, and that RMR still works great today without any issue. I think the shake awake technology is cool, but completely unnecessary if the battery can last that long.

Weatherproof Performance

The most significant difference is that the EPS Carry has an enclosed emitter, while the 507K has an exposed emitter. Long story short, the EPS Carry blows the Holosun 507K out of the water when it comes to mud and water protection.

holosun 507k dealing with melting snow

If it gets dirty, It's very easy to clean the front and rear lenses. I just rub it off with my shirt sleeves or gloves. There is really nothing more to say about that. Watch this video to see for yourself.

If dealing with water with the 507K, it's easy to clean out. However, if dealing with mud or frost. the optic is basically disabled. You can't see the dot and you need something to dig out the stuff. I have tried this many times during the winter in the mountains, and 507K doesn't do well once those environmental elements are introduced.

However, tests like this are intentional where I throw them into the puddle. In a practical setting, the chance of you throwing the gun into snow or mud is very little. So, the 507K is still a great option for normal range operation without doing anything crazy.

glock 43X MOS holosun EPS carry

In addition to these major differences, there are some smaller differences worth noting:


  • The 507K and EPS Carry models both weigh one ounce.
  • The standard EPS model weighs 1.4 ounces.
  • The 507K measures 0.95 inches tall, 0.98 inches wide, and 1.6 inches long.
  • The EPS measures 0.99 inches tall, 1.18 inches wide, and 1.61 inches long.
  • The EPS Carry model is slightly smaller, measuring 0.95 inches tall, 1.05 inches wide, and 1.61 inches long.


  • Holosun has smaller buttons on the 507 and 407 series (X2 models).
  • The EPS Carry, with its enclosed design, features larger buttons, which are easier to press and adjust.

Holosun 507K Specs

holosun 507k x2 battery removed

Magnification: 1X

Reticle: 2 MOA dot, 32 MOA ring, or combined

Turret Value: 1 MOA / click

Window Size: 0.58" X 0.77"

Construction: 7075 T6 aluminum IP67 rated

Dimension: 1.6" X 0.98" X 0.95"

Weight: 1 oz

Battery Life: CR1632, 50K hours

Brightness Settings: 10 daylight, 2 night vision

holosun 507k x2 front lens

Holosun EPS Carry Specs

holosun eps carry sig p365

Magnification: 1X

Reticle: 6 MOA dot

Turret Value: 1 MOA / click

Window Size: 0.58" X 0.77"

Construction: 7075 T6 aluminum IP67 rated

Dimension: 1.6" X 1.16" X 1.13"

Weight: 1.72 oz

Battery Life: CR1632, 50K hours

Brightness Settings: 10 daylight, 2 night vision

holosun eps carry on springfield hellcat

Holosun EPS Carry VS 507K Battery Life

Both optics can last around 50,000 hours based on the spec. So far none of them has died. I will update this content in about 3 years and see if that's true.

Holosun 507K VS EPS Carry Optic Deck Height

The 507K X2 and EPS Carry have identical deck heights. Depend on the handguns they will go on. The adapter plate thickness can play a role to further increase the optic mount height.

For the three popular carry guns we have used. Glock 43, P365 and Hellcat. Both red dot sights don't seem to sit too tall on the slide, and I can still co-witness the iron sights.

Holosun 507K VS EPS Carry Reticles

Holosun 507K and the Holosun EPS Carry both offer the multiple reticle system for the standard model. Both red and green reticles are offered. If you ever wonder if red dot vs green dot actually matter for shooting. Please watch this video for explaination:

The 507K also offers the ACSS reticle that the EPS Carry doesn't. The ACSS Vulcan reticle helps the shooter to reacquire the dot much faster if it's slightly out of alignment.

holosun 507C acss vulcan reticle

The Holosun EPS Carry on the other hand offers the 2 MOA or the 6 MOA single dot only model that the 507K doesn't. For users that prefer a large single dot reticle, the EPS Carry is definitely the better option for people with astigmatism.

6 MOA outdoor sunny day

The Holosun 507K comes with the multi reticle options:

  • 2 MOA only
  • 32 MOA ring only
  • Combined

Based on my personal experience, the multi reticle feature is a nice to have that comes with the Holosun 507K, but it doesn't significantly change the way I shoot.

The 2 MOA dot is a standard size dot that most red dot sights like Aimpoint Micro, and it doesn't clutter up the field of view, and lately I have really been a fan of the single dot than the one with the 32 MOA ring around it.

When using the EPS Carry, I actually preferred the 6 MOA option and I absolutely loved it.

As far as changing the setting goes, both optics have the same order of operations to cycle through reticle settings.