+1 570 368 3920

Holosun HE403B-GR Green 2MOA Dot 20mm FDE Micro Reflex Sight HE403B-GR-FDE

SKU HE403B-GR-FDE-Holosun

List Price $224.99
Your Price
You Save $65.00
Financing Available at Checkout

Email me if price drops

Email Address

Export Restrictions
Government Export Restriction
This item may be regulated for export by the U.S. Department of State or the US Department of Commerce. Please see our Export Policy.


Holosun’s HE403B is the perfect addition to any modern sporting rifle/carbine setup, and offers high performance and a wide assortment of exclusive features. It utilizes a precise 2 MOA dot reticle, allowing the operator to make exact shot placement at close to mid-range, and can be paired with a magnifier for long range targets. The HE403B is also parallax free and has unlimited eye relief, allowing it to be positioned at any point on the rail, and a lower 1/3 cowitness mount allows the optic to be used in conjunction with iron sights. Like many of Holosun’s premium optics, the HE403B is equipped with the Shake Awake function, which automatically activates the reticle at the slightest movement, and deactivates it after a period of motionlessness. This means the HE403B is ready as soon as the host weapon is picked up, and will automatically deactivate to preserve battery life. The reticle is illuminated by Holosun’s Super LED and features 12 levels of brightness intensity – 10 daytime, 2 night vision – allowing the reticle to adapt to the surrounding light levels. In addition, the HE403B is outfitted with multilayer lens coatings to maximize light transmission and reduce glare.

Features of the HE403B Red Dot Sight:

  • 2 MOA dot reticle
  • Parallax free/unlimited eye relief
  • Shake Awake technology
  • Super LED
  • Multi-coated lenses


  • Magnification Range:1x
  • Reticle Details2 MOA dot
  • Objective Lens Diameter:20mm
  • Dimensions:Length: 2.57 inches
    Width: 1.59 inches
    Height: 1.63 inches
  • Weight:2.82 ounces
  • BatteryCR2032
  • Battery TypeCR2032
  • Night Vision CompatibleYes
  • Brightness Settings10 daytime
    2 night vision
  • Product TypeReflex Sight/Red Dot
  • Item ConditionNew
  • UPC605930625158

Customer Reviews

Average Rating
July 22, 2023

Seems like a great green dot sight (haven't sighted it in yet). I am red/green colorblind but green stands out better for me and works better in the daytime. Paired mine with the Midwest industries rotating mount for the kel TEC sub2000. Gonna make for a great backpack gun. Shipped and arrived faster than I expected.

Was this review helpful?  

Review this product


Get News, Deals and Updates

EuroOptic International Sites:

Please Wait...