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Holosun Paralow HS403B with INNOMount

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Holosun Paralow HS403B with INNOMount Details

About the Paralow series

Paralow is one of the red dot sight series made by Holosun. On the outside, these small tube sights are very familiar to the Micro red dot sights made by the famous Swedish red dot sight manufacturing company. 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 403 is one of the model families in the Paralow series. The first number '4' in its name suggests that it features a 2 MOA dot. The second number '0' implies that the product comes with standard accessories (without honeycomb filter, quick-release mount and flip-up lens covers).

About the product (HS 403 B)

HS403B is a red dot sight of the Paralow series.

The letter 'B' means that the battery compartment is on the right side of the device in the form of a battery tray. Also, it lacks the solar panel, which is why this model has buttons for the regulation of illumination intensity on the top instead of on the side.

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.

Main features:

  • 2 MOA dot

  • comes with a low mount and a high mount for lower third co-witness on standard AR platforms

  • included mount made by INNOmount

  • ShakeAwake

  • same mounting platform as Aimpoint Micro devices

  • 12 illumination intensity levels, 2 of them are NVD compatible

  • Parallax free

  • 50.000 hours of battery life

  • the battery compartment on the right side of the device in the form of a battery tray

Mounting details

These small tube sights come with a high mount for an AR platform (lower 1/3 co-witness) and a low mount for other mounting purposes (such as mounting on a rifle). All models in the Paralow series except the ones with the letter 'A' in their name have the same mounting platform as the Aimpoint Micro devices.

The product comes with a mount made by INNOmount.

INNOmount is a German manufacturer of high quality mounts, known for offering reliable, durable and aesthetically appealing mounting solutions for different types of firearms and optical devices.

All Paralow models except the model with the letter 'A' in its name have the same mounting surface as the Aimpoint Micro models. We offer certain Holosun models with the high-quality INNOmount included. For now, these are the mounts that can be ordered within this package:


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

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

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Holosun Paralow HS403B with INNOMount Specifications

Made inChina
In production since-
WarrantyHolosun Classic - 5 years (Housing) / 3 years (Electronics)
Temperature range-40° / +70°
Power SupplyCR2032
Battery life.0
Filled with -
Lens coating Fully Multicoated
Integrated mount typeDetachable mount
Mount length.0mm
Window sizeN/A
Dot Sight TypeSmall tube sight
Tube diameter -
Adjustment per click 14mm/100m - 1/2MOA
Elevation50 MOA
Windage (mrad). 14.53
Reticle2 MOA
Reticle position N/A
Reticle illumination Yes
Illumination color Red
Daytime-usable illumination Yes
Auto Turn-Off No
Dot size.2
Adjustable intensityN/A
Parallax setting Free of Parallax
Waterproof Yes
Fogproof Yes


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