Holosun EPS in detail

Holosun EPS is on of the most popular models from Holosun production. We will cover details of this red dot in this article. It is not review as such, instead we put all valuable information into this post so that you can decide yourself whether this optic device will work for you or not.

Mounting compatibility

Compatibility of red dots is solve by a footprint.

What does footprint stand for? Well as any other footprint, in this case also footprint tells us what does the bottom of the red dot look like.

With that information we will understand what kind of mounting device we have to use in order to fit the red dot. I.e. what is the positoin of the pins and screw holes of the red dot so that we can mount it.

Why is it important? It is one thing to get the best red dot, but it can be another thing to be able to mount the red dot to the gun you want. Luckily, most of the manufacturers share 4 or 5 main types of footprints to accomodate its red dots.

Holosun EPS footprint

Holosun EPS shares the same footprint as Holosun K-series. Thanks to that you can install this red dot to any mounting device that uses the Holosun K-series footprint – whether red dot mount or red dot plate.

If you wonder which other red dots share the Holosun K-series footprint, and thus can use the very same mounting devices as Holosun EPS, check this article: Holosun K-series footprint standard.


Holosun K-series footprint consists of two pins in the front that will slide into the sockets on the bottom of the red dot, and two screw holes in the middle of the device for fixation of the optics to the base by screws.

*Its needed to say that Holosun EPS is a little unusual in the footprint. The red dot has 4 sockets on the bottom while K-series footprint has only two pins. Nevertheless the red dot will fit and work 100%. As per image below.*

Holosun EPS footprint_Holosun 507K standard

Screws for mounting of the red dot to the plate are always included in the red dot package.


Holosun EPS Carry is subcompact sized red dot. Definitely smaller than Holosun 507C and Trijicon RMR type 2.

Compared to EPS Carry, the EPS is only slightly larger. Considering weight though, EPS is 0.4 oz heavier than EPS Carry yet still 0.32 oz lighter than heavy titanium Holosun 509T. EPS weights 1.4 oz.

The dimensions of the red dot are following:

Length: 41mm / 1.62 in
Width: 30mm / 1.19 in
Height: 25mm / 0.99 in
Weight: 40g / 1.4 oz

The dimensions of the red dot window are slightly larger compared to more compact Holosun EPS Carry. The dimensions are following:

Width: 23mm / 0.91 in
Height: 16mm / 0.63 in


You can download the Holosun EPS Carry guide.

Frequently asked questions

You may be looking for answers to one of these questions. For each find the answer below.

What footprint is the Holosun EPS?

Holosun EPS use Holosun K-series footprint standard.

How to turn on Holosun EPS?

Press and release either the “+” or “-” button in order to turn the red dot on.

How to turn off Holosun EPS?

Press the “+” and “-” button at the same time in order to turn the red dot off.

How to change reticle on Holosun EPS?

Press and hold the “-” button for 3 seconds in order to change the reticle.

How to adjust Holosun EPS?

To adjust height you have to use the elevation screw on top of the tail of the red dot.

To adjust side you have to use the windage screw on the right side of the housing of the red dot.

How to change battery in Holosun EPS?

Unscrew the screw on the right side of the red dot that holds the battery cover.

Subsequently remove the cover to approach the battery of the red dot.

The battery is CR1620.

Technical data

Reticle 2 MOA Dot & 32 MOA Circle
Light Wavelength 650nm
Reticle Color Red
Parallax Free Yes
Unlimited Eye Relief Yes
Magnification 1x
Multi-Coatings Yes
Power Source Battery
Battery Type CR1620
Battery Life (Hours) 50000
Brightness Setting 10 DL&2 NV
Window Size 0.63×0.91
Dimension (in) 1.62×1.19×0.99
Weight (oz) 1.4
Housing Material 7075 T6 Aluminum
Surface Finish Anodize
Adjustment per Click 1.5 MOA
W&E Travel Range ±30 MOA
Storage Temperature -40℃~70℃
Working Temperature -30℃~60℃
Submersion IPX8
Vibration 5000G


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