Holosun Micro HS503BU Red Dot Sight

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 503 is one of the model families in the Paralow series. The first number '5' in its name suggests that the user can switch between a 2 MOA dot and a 2 MOA dot surrounded by a 65 MOA circle. 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 503 BU)

Holosun 503 BU is a red dot sight of the Paralow series.

The letter 'B' means that the device has the battery compartment 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 letter 'U' implies that the turrets of the device are shrouded and thus protected against potential blows.

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 & 2 MOA dot surrounded by a 65 MOA circle
comes with a low mount and a high mount for lower third co-witness on standard AR platforms
ShakeAwake
shrouded turrets
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.

Warranty

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.

General properties

Manufacturer	Holosun
Dot sight series	Holosun Paralow
Made in	China
In production since	-
Warranty	Holosun Classic - 5 years (Housing) / 3 years (Electronics)
SKU	HS503BU

Turret properties

Adjustment per click	14mm/100m - 1/2MOA

Reticle properties

Reticle illumination	Yes
Illumination color	Red
Daytime-usable illumination	Yes
Auto Turn-Off	Yes
Dot size.	2.00 MOA
Parallax setting	-

Physical properties

Length.	66.00 mm
Weight.	138.00 g
Material	Aluminium
Working temperature range	-40/+60°C
Power Supply	CR2032
Filled with	-
Lens coating	Fully Multicoated
Tube diameter	-
Integrated mount type	Picatinny
Dot Sight Type	Small tube sight
Color	Black

Special features

Waterproof	Yes
Fogproof	Yes
Shockproof	Yes
Special features	Fogproof, Fully multicoated, Illuminated reticle, Shockproof, Waterproof
Mount rail type	Picatinny Mount

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Holosun Paralow HS503BU Product description

About the Paralow series

About the model family

About the product (HS 503 BU)

Mounting details

Warranty

General properties

Turret properties

Reticle properties

Physical properties

Special features

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