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Holosun Reflex HS507C-RD X2

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Holosun Reflex HS507C-RD X2 Details

About the Reflex series

Reflex is one of the red dot sight series made by Holosun. These compact sights are not closed on both sides like the Tube, Infiniti and Paralow series, which is why they are very compact and lightweight (there are some exceptions to this in the Holosun Reflex series – HS512T is closed from both sides and thus bigger while HS510C is a reflex-type red dot sight of a bigger design).

Because of their size, HS407C, HS507C, and HS508T are great for mounting on a pistol.

The illumination is powered by a CR2032 battery. The click value for the elevation and windage adjustments is 0.5 MOA. These durable red dot sights feature a single-piece housing made out of aluminum. Altogether, there are 12 illumination intensity levels to choose from, 2 of which are NVD compatible. The battery life is 50.000 hours.

About the model family

The 507 is one of the model families in the Reflex series. The first number '5' in its name means that the user can switch between a 2 MOA dot; 2 MOA dot surrounded by a 32 MOA circle or a 32 MOA ring only.

About the product (HS 507C-RD X2)

Holosun 507C-RD X2 is a red dot sight from the Reflex series.

The letter 'C' means that the device features a solar panel on top of the lens frame – the red dot sight can work without the battery inserted when there is sufficient lighting.

The product features the ShakeAwake function. When left powered on, the device will go from 'active mode' to 'sleep mode' after a while to prevent unnecessary battery drain. Once moved, it will power back on immediately.

This is the third generation of the 507C sights, which replaced the second ‘V2’ generation. The company introduced the button lock mode, now found only on the ‘X2’ models.

The buttons have been reduced to the same size as they were originally, on the first models – Holosun made them smaller again and placed them horizontally.

But as opposed to the first 507C models, the second ‘V2’, and now the third ‘X2’ generation of these Holosun red dot sights have a side battery compartment, as it is no longer positioned on the bottom.

Main features:

  • 2 MOA dot & 2 MOA dot surrounded by a 32 MOA circle

  • compact and lightweight

  • a solar cell on top of the device

  • perfect for a pistol or a rifle

  • ShakeAwake function with the last setting recall

  • 12 illumination intensity levels - 2 of them are NV compatible

  • Parallax free

  • 50.000 hours of battery life

  • the battery compartment is on the side of the device

Mounting details

A fixed mount for the Picatinny platform is included.


The Holosun Classic warranty is 5 years on the material and 3 years on the electronics.

For more information regarding the Holosun model labels, check our blog post.

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Holosun Reflex HS507C-RD X2 Specifications

Dot sight seriesHolosun Reflex
Made inChina
In production since2017
WarrantyHolosun Classic - 5 years (Housing) / 3 years (Electronics)
Click Value 14mm/100m - 1/2MOA
Windage - mrad. 12.801mrad
Windage - MOA.39MOA
ReticleCircle Dot
Reticle position No
Reticle illumination Yes
Illumination color Red
Usable at daytime Yes
Automatic Turn Off No
Size of Dot.2.2651MOA
Adju. intensityYes
Parallax setting Free of Parallax
Working temperature range- 40 °C / + 70 °C
Power Supply UnitCR2032
Battery lifespan.0h
Filled with Nitrogen
Lens coatings Fully Multicoated
FootprintTrijicon RMR standard
Mount type - IntegratedFixed mount
Mount length.0mm
Size of window23 mm x 16 mm
Dot Sight TypeSmall tube sight
Water proof IPX-8
Fogproof Yes
Shock proof>1501 G


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Reviews & Testimonials

Reviews for Holosun Reflex HS507C-RD X2

2 reviews
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Good first pistol rds By
I've used the HS 507C V2 mounted on an RMR cut Glock 17 for 6 months now with about 2000 rounds shot. In my experience the optic is great value for your money and searching the internet the majority of reviews will say the same.

The reticle options are a nice extra especially for less experienced dot users. Most people do eventually settle on using the simple dot.

Issues like water/snow disturbing the sight picture can be attributed to the open emitter design more than only the 507. A holster that covers the optic helps, but if you want to roll around in mud all day I'd suggest a closed emitter system.

My specific optic has the cirle dot emitter ever so slightly offset giving a tilted sight picture. This does not affect shooting in any meaningful way and is barely noticeable, but could drive someone with OCD crazy. I h

(Posted on 11/03/2021)

Works well By
Overall it's a good sight but has a few minor issues. The reticle is well focused, very clear, lacks any streaking unless run super bright in dim light and it can get bright enough even against snow on a sunny day. I was unable to get a good picture of the reticle, so what you see in the pics I took does not reflect how that aspect looks. The option of 3 different reticles is also very welcome. I think this is well worth the money and it functions great so far (about 1000 rounds of 22LR). I recommend it, but there is room for improvement too.

(Posted on 09/03/2021)

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