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Holosun HS403B "Shake Awake" Compact Red Dot Sight w/ Low & AR Mount (Color: Black)

ID: 84394 (RD-HS403B)
Holosun HS403B Shake Awake Compact Red Dot Sight w/ Low & AR Mount (Color: Black)
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MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Non-Export ItemShips Inside USA Only
This is an export-restricted item and can only be shipped within the United States. No international delivery for these items.
Free ShippingNo Coupon Required
Free shipping within lower 48 US states, no coupon code needed!
Color Options:


  • Precision CNC machined from T6061-T6 aluminum
  • 50,000 hours of operation on one battery; 25,000 hour battery life on setting 10
  • Designed for day and night use; Red - 2 MOA dot size; memory function for brightness setting
  • Parallax-free with unlimited eye relief
  • Unaffected by extreme weather conditions
  • Low mount & 1/3 co-witness (AR) mount included (Works with Picatinny & Weaver rails)
  • Shake Awake automatically turns optic on when movement is detected, optic will auto shut off when no movement is detected
HS403B is a 20mm micro sight designed for rifle and carbine applications. HS403B features Holosun™s Red Super LED with 50k hour battery life, 10 daylight and 2 night vision compatible reticle intensity settings. Its housing is made from 6061 aluminum and includes both a lower 1/3 co-witness mount (1.63) and a low mount (.75) for low-comb height rifle applications.

Additional features include Shake Awake technology, digital buttons for setting changes, rubber lens covers, and a side-mounted battery tray for the 2032 battery. HS403B is a versatile sight for users of all levels.

Manufacturer: Holosun


Reticle: 2 MOA Dot
Light Wavelength: 650nm
Reticle Color: Red
Parallax Free: Yes
Unlimited Eye Relief: Yes
Magnification: 1x
Multi-Coatings: Yes
Power Source: Battery

Battery Type: CR2032
Battery Life (Hours): 50000
Brightness Setting: 10 DL&2 NV
Window Size: 20mm Diameter
Dimension (in): 2.45 x 1.43 x 1.6
Weight (oz): 2.82
Housing Material: 6061 T6 Aluminum
Surface Finish: MAO
Adjustment per Click:0.5 MOA
W&E Travel Range: +50 MOA
Storage Temperature: -40°C ~ 70&Deg;C
Working Temperature: -30°C ~ 60°C
Submersion: IP67
Vibration: 1000G

2 Customer Reviews

(Write a review)

by Logan A. on 05/20/2021
"This sight is amazing, I have owned mine for over 5 months and have not needed to change the battery, it lasts for ever.

Runs easily available batteries
long battery life
Great price for an amazing red dot
dot is clear
easy windage and elevation adjustments, no screwdriver needed just use the cap
Comes with riser for hard lower face masks
Changes intensity based on inside or outside

uses a tiny torx screw to secure battery
uses torx for securing to picatinny

Other than that this sight is amazing
im 17 with perfect eyesight, I have no clue how this will behave with glasses
by Skydan L. on 11/27/2019
"Best Red dot for the price
Battery life is about 1,205,039 gallons of milk
Strong (I’ve dropped it and it’s chillin)
Very bright or not if you don’t want it to
Crisp red dot
Looks nice
Tinted so sun problems nope
Nice box
Other things
Only red dot but that’s the model type
Need tool to put on and battery compartment is weird but comes with tools

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