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Holosun HS403B Red Dot Sight, 2 MOA
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun

Holosun HS403B Red Dot Sight, 2 MOA

Price 258.99 USD excluding sales tax
Shipping starting at 9.99 USD Free 100 day returns Free shipping for orders over 200 USD

The Holosun HS403B is a red dot sight designed for rifles and carbines, especially suitable for the flat top of an AR-15 but mounts to any Picatinny rail.

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Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.
Holosun HS403B Red Dot Sight, 2 MOA.

The Holosun HS403B is a red dot sight designed for rifles and carbines, especially suitable for the flat top of an AR-15 but mounts to any Picatinny rail.

The HS403B is compact and lightweight with a 20 mm lens and 2 MOA dot. The dot has 10 brightness settings to adjust for any lighting conditions and 2 additional settings for NVG use. The battery life is exceptionally long at 50,000 hours on a medium brightness setting.

When the sight sits still for 8 hours (programmable between 0-12 hours), the sight goes to sleep mode and wakes automatically when picked up.

In the protective case with the sight you'll find:

  • Lower 1/3 Co-witness Mount
  • Low-Profile Mount
  • T10 Torx key
  • Battery tray tool
  • Spare Battery Tray
  • Rubber Cover
  • User Manual
  • CR2032 Battery
  • Lens Cloth

Tips for battery replacement

Installing the battery is a bit tricky and you have to do it once before using the sight. Thankfully, the battery life is long, and changing it can be done without removing the sight: it does not affect your zero.

The sealing O-ring is a bit oversized and difficult to wrestle into place. Consider using a smaller seal (extra O-rings are often included with flashlights, for example) while making sure it's tight enough.

The battery tray requires some pressure from the top as you insert and tighten the screws to ensure proper alignment. Don't screw at an angle!

The battery tray is made of polymer and the screw tabs could be broken by overtightening the screws. The sight comes with an extra tray and screws if you ham-fist it.

Specifications

Length62 mm2.45"
Width36 mm1.43"
Height40 mm1.6"
Weight (w. 1/3 CW mount)135 g4.8 oz
Weight (sight only)80 g2.82 oz
Operating temp.-30°C - 60°C-22°F - 140°F
Dot Size2 MOA
Brightness settings10 + 2 (NVG)
Adjustments0.5 MOA / Click
Battery lifeUp to 50,000 hours
Waterproof ratingIP67
Vibration resistance1,000 G

Made in China.

All products: Holosun

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