Holosun Micro 2 MOA Red Dot Sight with Shake Awake - HS403B

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Holosun Micro 2 MOA Red Dot Sight with Shake Awake - HS403B


Quick Overview

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SKU: 52661
UPC: 760921087428
MFR#: HS403B
  • Light Source: LED
  • Reticle: 2MOA Dot &amp
  • Parallax Free: Yes
  • Unlimited Eye Relief: Yes
  • Magnification: 1x
  • Battery Type: CR2032 (sold separately) 
  • Battery Life: Up to 50,000 hrs
  • Brightness Settings: 10 Day & 2 Night Vision compatible
  • Housing Material: 6061 Aluminum with Titanium Hood
  • Adjustment per click: 0.5MOA
  • Height: 1.63 In
  • Weight: 4.3 oz

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The 403B is a small compact micro red dot optic. Employing Holosun’s LED technology, the lifetime for one CR2032 battery can be up to 5 years. This optic features our “Shake Awake” technology that powers the optic on with slight movement of the 403B. It may be installed on various firearms such as shotguns, pistols, air rifles and crossbows. The HS403B is compatible with standard mounts.

  • Designed for day and night use
  • New advanced technology LED allows up to 50,000 hours of operation on one CR2032 battery (sold separately) 
  • 2 MOA on dot size
  • Reduced training time and ammunition
  • Unlimited field of view
  • Parallax-free with unlimited eye relief
  • Unaffected by extreme weather conditions
  • Durable and reliable construction
  • Low mount and 1/3 Co-witness mount included


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SKU: 52661
SKU 52661
Brand Holosun
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 52661

Questions and Answers

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Browse 7 questions Browse 7 questions and 20 answers
Mine came with no battery. Is that normal?
Charlie W on Jun 27, 2018
BEST ANSWER: This item does not come with batteries.
Does it come with a battery?
kyle E on Jun 18, 2018
BEST ANSWER: Unfortunately, those items are not shipping with batteries.
Does this have solar?
Eddie on Mar 21, 2019
BEST ANSWER: No, other models do but this model doesn’t. I’ve had mine over a year and still haven’t needed to change the battery with weekly use mostly and sometimes daily
Can flip up sights be used with this sight?
Ken G on Jun 18, 2018
BEST ANSWER: The 1/3 mount will cause it to be right above the sights..buis will be seen on the lower 1/3 of optic view..if you want a perfect cowitness you need an absolute.
What makes this HS 403B different from HS 403GL?
Jaime on Dec 14, 2018
BEST ANSWER: Green dot
I have a Mossberg 930 Tactical with a 1913 Rail. I’m looking for a red dot that will handle the recoil from a 12 gauge. Will this sight hold up to that?
Dustin C on May 12, 2018
BEST ANSWER: This would be a good question to ask at the Holosun website.
What type or height mount should be used with this when equipping it to a tavor?
Lek15 on Nov 21, 2018


4.6 / 5.0
21 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Shake Awake Sight.
This one of the best red dot I have ever purchased. Works ever time, you pick it up.
May 22, 2019
2 months ago
Good little sight.
Coming from a guy who has trijicon and AimPoint sights, I was hesitant to buy this guy. Turns out to be a good piece of kit.

The good, relatively (for the price point) impressively clear glass. The sights hold it’s zero and adjust easily. The increments of intensity are not too much but not to small. But most important, the reflected dot is very crisp, clean, I would argue at or below 1 MOA.

What I cannot comment on is how durable this scope is. It is much lighter than a Trinicon and AimPoint, which in many respects is a good thing. Combine this with its base length (moment) from rail, I would be hesitant to deploy for a year with this scope into combat knowing how much our gear gets beat up. For the house, home defense, fun at the range however, she is tough enough.

Bottom Line, great sight for the price with some trade off’s that make this a good sight for fun and or for the home.
March 22, 2019
1 year ago
Poor mount
I liked this red dot until the point the mounting screw snapped. Junk.
February 23, 2019
Perfect match for my home defense weapon.
December 22, 2018
11 months ago
Awesome little dot!
Tough, bright well defined dot, holds zero, affordable and utterly reliable. What's not to love about it?
August 21, 2018
11 months ago
I think it is one of the best out there. The cost is a lot less than other dots .
August 21, 2018
11 months ago
Easy to use, not as easy to change battery
I love the shake and wake technology. I do not like the battery and battery compartment so much. You have to have the tiny star driver to loosen the 2 screws that hold the battery tray in place. The battery is a watch style battery, not that it is hard to come by, just another style of battery to have to keep around. I understand that the battery life is over 3 years, it’s just an FYI. From what I can tell, it is a quality piece of gear and I wouldn’t let the battery and battery compartment stop me from owning another.
August 20, 2018
11 months ago
Great red dot
Very nice quality optic. I chose this over the Vortex because it had 2 moa dot. I really like the shake awake feature.
August 9, 2018
10 months ago
Great Sight,easy to mount and sturdy
August 3, 2018
11 months ago
All I need
Crystal clear glass, easy to use and convenient controls, and nice bright aperture. Even without the awesome price I got from PSA I would absolutely grab another one of these. Comes with a high and low rise mount, extra battery tray, and all tools needed to install and adjust the optic. Plus a lens cover!
July 30, 2018
12 months ago

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