Holosun HS403B Red Dot Sight - 2 MOA

Manufactured by Holosun
Manufactured by Holosun
12 Reviews

In Stock

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The Holosun HS403B Red Dot Sight 2 MOA employs LED technology. Holosun’s “Shake-Awake” sight powers up with vibration and the user can customize the shut off time.  
The optic features a 50,000-hour run time using a single CR2032 battery. Compatible with standard mounts, this red dot can be mounted on various weapons platforms such as shotguns, pistols, air rifles, and crossbows. Holosun’s HS403B Red Dot Sight has 12 different brightness settings, and the sight works with night vision devices. 

  • Parallax free
  • Unlimited eye relief
  • Push button controls
  • Streamlined housing design
  • Shake-Awake auto on/auto off
  • Low mount and 1/3 co-witness mount included
  • 1913 Picatinny and Weaver rail compatible
  • 6061-T6 aluminum
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Battery Life50,000+ Hours
Battery TypeCR2032 3V Lithium Coin
Brightness12 Settings
Click Value1/2 MOA
FinishHardcoat Anodized
MaterialAluminum - 6061-T6
Mount CompatibilityAimpoint Micro
Night Vision CompatibleNight Vision Compatible
Reticle2 MOA Dot
Reticle ColorRed
Warrantylimited lifetime
Weight2.8 Oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

12 reviews

  • 4 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Great company

by -

Red dot was lost in shipping or was taken by a porch pirate but primary arms replaced it and sent me a new one free! Will definitely buy from here again. Have not used the red dot yet so my 5 stars are just for the company

Great red dot

by -

Can not beat the value in a Holosun red dot. Have a few of these on my rifles and rifle caliber pistols. This is a great value in a basic red dot.

Durability tested


Bought this red dot specifically to get banged up at the tactical games. It went through the ringer and came out fine, can't beat the price for the quality and reliability.

Love it

by -

Worth the price- 5 star

Good stuff

by -

Absolutely love Holosun optics. Tough, they hold zero, crisp, and you can’t beat the price.

Works great

by -

It work as intended and sturdy

I have a few and keep buying them

by -

This is my go to red dot optic… I have this optic on all my home defense rifles… easy.. light weight.. and the shake awake with 50,000 hours of battery life ensures it’s always ready.

Holosun HS404B Red Dot

by -

Holosun HS403 Red Dot is a great product. It is reliable and a simple design that work good.

Red glare

by -

Feels well made but I get a red glare most the time when looking through it. I even have a bushnell trs 25 that doesn't get a glare like this red dot does

We are happy to help you resolve this issue per our conversation.

Works well

by -

Much more crisp than the sig I had. Perfect