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Holosun HS403B 2MOA Dot Only 20mm Micro Reflex Sight HS403B

SKU HS403B-Holosun

List Price $145.00
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The HS403B is a 20mm micro optical sight designed for rifle and carbine applications. Features include 12 brightness settings, Holosun’s Super LED with up to 100k hours battery life, and 2 MOA Dot.

In the Box:

  • Lower 1/3 Cowitness Mount
  • RMR Adapter
  • Low Profile Mount
  • Rubber Cover
  • CR2032 Battery
  • T10 L Key
  • Lens Cloth
  • User Manual

Features of the Holosun HS403B

  • 2 MOA Dot Reticle
  • 12 Brightness Setting: 10 DL & 2 NV Compatible
  • Up to 50,000 Hours Battery Life (Setting 6)
  • Parallax-free & Unlimited Eye Relief


  • Magnification Range:1x
  • Reticle Details2 MOA Dot
  • Objective Lens Diameter:20mm
  • Dimensions:2.45×1.43×1.6
  • Weight:2.82 oz
  • BatteryCR2032
  • Battery TypeCR2032
  • Night Vision CompatibleYes
  • Brightness Settings2 NVD 10 Regular
  • Product TypeReflex Sight/Red Dot
  • Item ConditionNew
  • UPC760921087428
  • MPNHS403B

Customer Reviews

Average Rating
January 8, 2023

Quality beginner red dot. Fairly ideal for a basic home defense set up. Euro-optic generally has the best prices, wicked fast shipping, and I know I'm not going to get any counterfeits. If you get a chance, stop by their showroom in PA. Staff was super helpful, knowledgeable, and pleasant.

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July 17, 2023

I have this and the green dot version on a couple of rifles now. I also have other more expensive holosuns. This is no frills, and worth every penny at around $130. Holds zero and the battery lasts forever.

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March 28, 2022

If your looking for a small basic cheap red dot that’s light weight this is the one! It’s always on and ready to roll every time you pick it up! It’s Very bright or u can turn the dot down very low for night time or taking a accurate shot!

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May 11, 2021

Great red dot and very fast shipping. Looking forward to doing business again. Plus cheapest price I found. Thanks

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