Holosun 403R is a red dot sight of the Paralow series.
The letter 'R' indicates that the device features a rotary switch for setting the illumination intensity instead of the two buttons found on most Holosun red dot sights. The switch is located next to the battery compartment, on the side of the device.
Even though this device doesn’t have ‘U’ in its name, it comes with shrouded turrets.
‘RD’ indicates that this red dot sight features red illumination.
2 MOA dot
red and gold illumination
comes with a low mount and a high mount for a lower third co-witness on standard AR platforms
red dot optic features shrouded turrets
rotary switch instead of buttons for setting the illumination intensity
same mounting platform as Aimpoint Micro devices
12 illumination intensity levels, 2 of them are NVD compatible
holosun 403r parallax: micro optical sight is parallax free
up to 100.000 hours of battery life
the battery compartment is on the right side of the device under a round shaped cover
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.
The 403 micro red dot 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).
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.
If you are interested in footprint on Holosun 403R read our blog post Holosun 403R Footprint.
Holosun's warranty is 3 years on the material and on the electronics.
For more information regarding the Holosun symbols, check our blog post.
|Dot sight series||Holosun Paralow|
|In production since||2019|
|Click Value||14mm/100m - 1/2MOA|
|Windage - mrad.||14.53mrad|
|Windage - MOA.||50MOA|
|Usable at daytime||Yes|
|Automatic Turn Off||Yes|
|Size of Dot.||2MOA|
|Working temperature range||-30℃~60℃|
|Power Supply Unit||CR2032|
|Lens coatings||Fully Multicoated|
|Tube size/diameter||20 mm|
|Mounting Standard||Aimpoint Micro|
|Mount type - Integrated||None|
|Size of window||No|
|Dot Sight Type||Small tube sight|
|Type of mount rail||Picatinny Mount|