Holosun 407K in detail

Holosun 407K is a popular subcompact sized red dot models from Holosun production. In this article we provide you with all details about the optic, its compatibility, etc. 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 407K footprint

Holosun 407K footprint and Holosun 407K X2 footprint are the same as both share the same Holosun K-series footprint standard. 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 407K (incl Holosun 407K X2), 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.

Holosun K-series footprint

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


Holosun 407K is subcompact size red dot, the same as Holosun 507K. The dimensions of this red dot are 100% the same as of Holosun 507K. Also the weight is exactly the same: 1 oz.

From subcompact red dots of another manufacturers the weight is however quite higher. For example Shield RMS has 0.6 oz.

The dimensions of the red dot are following:

Length: 41mm / 1.6 in
Width: 25mm / 0.98 in
Height: 24mm / 0.95 in
Weight: 28g / 1 oz

Similarly as the body of the red dot, also the window of the red dot is 100% identical as of Holosun 507K. The only difference is basically larger dot. While 507K has 2 MOA dot (and 32 MOA circle), the 407K uses larger 6 MOA dot that you may prefer for self defense every day carry. More on the topic of MOA in red dot here.

The dimensions of the red dot window is following:

Width: 20mm / 0.77 in
Height: 15mm / 0.58 in

The size of window is the same as for the Holosun SCS MOS red dot.


You can download the Holosun 407K X2 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 407K?

Holosun 407K use Holosun K-series footprint standard.

How to turn on Holosun 407K?

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

How to turn off Holosun 407K?

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

How to change reticle on Holosun 407K?

Holosun 407K does not have switchable reticles.

How to adjust Holosun 407K?

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 407K?

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 CR1632.

Technical data

Reticle 6 MOA Dot
Light Wavelength 650nm
Reticle Color Red
Parallax Free Yes
Unlimited Eye Relief Yes
Magnification 1x
Multi-Coatings Yes
Power Source Battery
Battery Type CR1632
Battery Life (Hours) 50000
Brightness Setting 10 DL&2 NV
Window Size 0.58×0.77
Dimension (in) 1.6×0.98×0.95
Weight (oz) 1
Housing Material 7075 T6 Aluminum
Surface Finish Anodize
Adjustment per Click 1 MOA
W&E Travel Range ±30 MOA
Storage Temperature -40℃~70℃
Working Temperature -30℃~60℃
Submersion IP67
Vibration 5000G


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