Holosun 507C in detail

Holosun 507C in detail

Holosun red dots gained a lot of popularity over the last few years. In this article we will not do any sort of review of the red dot as such. Instead we offer valuable information about Holosun 507C for practical decision making whether or not go for for this red dot.

Mounting compatibility

Compatibility of red dots is measured by so called footprint.

What does footprint stand for? Well as any other footprint, it tells us what does the bottom of the red dot look like. And by that information we will understand what kind of mounting device we have to use in order to fit the red dot.

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 507C footprint

Holosun 507C shares the same footprint as Trijicon RMR. Thanks to that you can install this red dot to any mounting device that uses the Trijicon RMR footprint – whether red dot mount or red dot plate.

If you wonder which other red dots share the Trijicon RMR footprint, and thus can use the very same mounting devices as Holosun 507C, check this article: Trijicon RMR footprint standard.

Trijicon RMR footprint standard

Trijicon RMR footprint consists of two pins in the front that will slide into the bottom of the red dot, and two holes for screws to fixate the red dot to the base from the top.

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


Holosun 507C red dot (both first generation as well as second generation “X2”) is a relatively compact sized red dot.

Holosun 507C dimensionsThe dimensions of the red dot are following:

Length: 45mm / 1.78 in
Width: 29mm / 1.15 in
Height: 29mm / 1.15 in
Weight: 42g / 1.5 oz

Holosun 507C window dimensions

The dimensions of the red dot window is following:

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


You can download the Holosun 507C_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 507C?

Holosun 507C red dot (incl. Holosun 507C X2) use Trijicon RMR footprint standard.

How to turn on Holosun 507C?

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

How to turn off Holosun 507C?

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

How to change reticle on Holosun 507c?

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

How to adjust Holosun 507C?

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 507C?

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 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 Solar & Battery
Battery Type CR1632
Battery Life (Hours) 50000
Brightness Setting 10 DL&2 NV
Window Size 0.63×0.91
Dimension (in) 1.78×1.15×1.15
Weight (oz) 1.5
Housing Material 7075 T6 Aluminum
Surface Finish Anodize
Adjustment per Click 1 MOA
W&E Travel Range ±50 MOA
Storage Temperature -40℃~70℃
Working Temperature -30℃~60℃
Submersion IP67
Vibration 5000G


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