Holosun HS403R 2 MOA Micro Red Dot Sight

Manufactured by Holosun
Manufactured by Holosun
6 Reviews

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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The Holosun HS403R Micro Red Dot Sight is ultra-light, durable, compact, and simple to eliminate fail points as well as keep the cost down. This affordable red dot sight features a 2 MOA reticle with a new rheostat adjustment dial that lets you quickly cycle through the 10 brightness settings. Additionally, a new efficient LED allows for up to 100,000 hours of battery life on a single battery. This red dot is made with an aluminum housing and matte black anodized finish as well as IP67 rated water resistance. With unlimited eye relief and zero parallax, the HS403R Micro Dot will pair great with PDW or carbine style firearms.

  • New brightness rotary control
  • 2 MOA red dot
  • .5 MOA windage and elevation adjustments
  • Aluminum housing with black anodized finish
  • Powered by a single CR2032 battery (included)
  • Up to 100,000 hours of total battery life
  • 10 brightness settings and 2 night vision compatible
  • IP67 rated water resistance
  • 20mm fully multicoated lenses
  • Unlimited eye relief and parallax free
  • Includes low mount and 1/3rd co-witness mount

The elevation and windage adjustments knobs feature .5 MOA clicks with a total of 50 MOA travel in either direction. They are also protected by raised aluminum shrouds to prevent them from getting hit and losing zero. With IP67 water resistant rating, it can be submerged under a meter of water for 30 minutes without shorting. Included is a low picatinny mount optimal for AK-47’s or other rifles where you want it as close to bore as possible. But it also includes a raised picatinny mount that allows you to have a lower 1/3rd co-witness with iron sights. Despite being small, this red dot packs a lot of punch at an affordable price.

Holosun Technologies is committed to creating innovative optic, laser/IR technologies for a broad range of shooting, hunting, law enforcement, and military needs. Using quality manufacturing standards, they provide military grade optics without the military grade price.
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Battery Life50,000+ Hours
Battery TypeCR2032 3V Lithium Coin
Brightness10 Settings
Click Value1/2 MOA
FinishHardcoat Anodized
Night Vision CompatibleNight Vision Compatible
Reticle2 MOA Dot
Reticle ColorRed
Warrantylimited lifetime
Weight3.53 oz.

Ratings & Reviews

6 reviews

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Can't be beat for the price

by -

Mounted on my build about a month ago. Holds zero and has been left on with no issues. Only complaint is the rotary dial isn't as tactile or stiff as I would like.



These sights are freaking amazing. I have more than a few holosuns and they are all awesome. Great value for the quality and features that come on these sights! If i was rich i would buy aimpoints for all my guns, but since I’m not, these sights are great!

Quality at a good price

by -

Factory zero was true to the installed factory mount.

Solid for the price

by -

This was a great way to get into the world of red dots on my AR15 without spending huge bank, and it appears to be good enough for my civilian needs. Two mount heights are included, and the higher of the two allows me to lower 1/3 witness with my A2 front sight and back up rear sight like on my USAF M4. One downside for me is that the shape of the rear of the housing allows glare in the lense from the sun and other light sources at a certain angle that I apparently encounter regularly. For me, the dot is comma shaped, but that is apparently from my eyes (I have the same issue with an Aimpoint CompM5 when I qualify on M4). The other downside for me is that brightness settings 1-5 aren't all that useful for me as they are far too dim--I'm almost always on a 6 or 7 which isn't the worst given the advertised battery life of the device so I can just leave it on setting 6. I'm happy with PA price and shipping, as usual, so it was a no-brainer to buy the optic here.

Phenomenal value

by -

Couldn’t ask for more. Very happy with the purchase.

My 2nd one purchased

by -

Excellent battery life, holds zero, slim frame that doesn't interfere with your sight picture, and zero parallax with two eyes open. It's just a floating red dot in space.