Holosun HS403B Red Dot

Name: Holosun HS403B Red Dot
Brand: Holosun
Availability: OutOfStock

Holosun · Sights & Optics

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Best price

$169.99at Rainier Arms

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Buy at Rainier Arms

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Where to buy

Store	Price	Availability	Buy
Rainier Arms Best price	$169.99not checked recently	Check store	Buy at Rainier Arms
Palmetto State Armory	$169.99not checked recently	Check store	Buy at Palmetto State Armory
Brownells	$112.49Salechecked Oct 1, 2026	Out of stock	Buy at Brownells

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Dashed line = out of stock. Tracking since Sep 27, 2026.

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Store	Latest	Lowest	Highest
Brownells	$112.49	$112.49	$112.49

Since Sep 27, 2026.

About this part

The Holosun HS403B Red Dot is a red dot sight from Holosun. It's sold by 3 stores, from $112.49 to $169.99.

Specifications

Manufacturer: Holosun
Type: Red Dot
Magnification class: 1x (non-magnified)
Red dot footprint: Aimpoint Micro / T2

From the manufacturer

The 403B is a small compact micro red dot optic. Employing Holosun’s LED technology, the lifetime for one CR2032 battery can be up to 5 years. This optic features our “Shake Awake” technology that powers the optic on with slight movement of the 403B. It may be installed on various firearms such as shotguns, pistols ,air rifles and crossbows. The HS403B is compatible with standard mounts.
Features:
•Designed for day and night use•New advanced technology LED allows up to 50,000 hours of operation on one CR2032 battery•2 MOA on dot size•Reduced training time and ammunition•Unlimited field of view•Parallax-free with unlimited eye relief•Unaffected by extreme weather conditions•Durable and reliable construction•Low mount and 1/3 Co-witness mount included

OPTICAL DATA

Light Source
LED

Reticle
2MOA Dot

Parallax Free
Yes

Unlimited Eye Relief
Yes

Magnification
1x

Multi-Coatings
Yes

Integrated Laser
No

ELECTRONIC DATA

Battery Type
CR2032

Battery Life
Up to 50,000 Hours

Brightness Setting
10 Daylight & 2 NV Compatible

MECHANICAL DATA

Housing Material
6061 Aluminum

Surface Finish
MAO

Housing Color
Black

Adjustment per Click
0.5 MOA

W&E Travel Range
±50 MOA

Storage Temperature
-40? - 158?

Working Temperature
-22? - 140?

Submersion
IP67

Vibration
Up to 1000G

PHYSICAL DATA

Window Size
20mm Diameter

Dimension (in)
2.44 x 1.18 x 1.45

Weight (oz)
4.3

Central Height (in)
1.63