Holosun HS510C in detail

Holosun 510C is a full sized red dot from Holosun designed for long gun such as PCC, carbines or shotguns. In this article we cover details of this red dot. 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 510C footprint

Holosun 510C has a unique footprint that is to be used foremostly with its picatinny mounting interface, which is part of the package.

The fotprint of Holosun 510C consists of 10 screw holes and 2 recoil blocks. You will however not be dealing with the unique footprint, as you will have the red dot delivered already with picatinny mount.


Holosun 510C is a full sized red dot designed to work on long guns. The dimensions are matching that purpose as this red dot is considerably larger than any of the other Holosun red dots that are designed for pistols such as Holosun 507C or 507K.

The red dot has also titanium hood making it considerably heavier compared to smaller red dots for pistols. Yet compared to similar sized Holosun 512T, the 510C comes out as pretty light weight red dot.

The dimensions of the red dot are following:

Length: 84mm / 3.3 in
Width: 46mm / 1.8 in
Height: 59mm / 2.31 in
Weight: 140g / 4.94 oz

The dimensions of the red dot window are following:

Width: 32mm / 1.26 in
Height: 23mm / 0.91 in


You can download here the Holosun 510C 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 510C?

Holosun 510C uses unique footprint that does not fit any of the other footprint standards. Mounting device for picatinny base is part of the package.

How to turn on Holosun 510C?

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

How to turn off Holosun 510C?

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

How to change reticle on Holosun 510C?

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

How to adjust Holosun 510C?

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 510C?

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 CR2032.

Technical data

Reticle 2 MOA Dot & 65 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 CR2032
Battery Life (Hours) 50000
Brightness Setting 10 DL&2 NV
Window Size 0.91×1.26
Dimension (in) 3.3×1.68×1.78
Weight (oz) 4.94
Housing Material Aluminium & Titanium Hood
Surface Finish MAO
Adjustment per Click 0.5 MOA
W&E Travel Range ±50 MOA
Storage Temperature -40℃~70℃
Working Temperature -30℃~60℃
Submersion IP67
Vibration 1000G


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