HOLOSUN HE403B-GR / HS403B 2 MOA Dot Micro Sight for Rifles - Shake-Awake Super LED Durable Waterproof Aluminum Sight with Multilayer Reflective Glass & 12 Brightness Settings - Red/Green Dot Options
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Availability:
In Stock.
Arrives
Friday, Mar 13
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Color: Black
Style: Red 2 MOA Dot
Features
- HOLOSUN RED DOT SIGHT - HS403B is a 20mm micro sight designed for rifle and carbine applications; It features Holosun's ultra efficient 650nm Red Super LED with up to 50k hour battery life and 12 reticle intensity settings; The 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; Lens cloth, rubber lens cover, T10 L key, and CR2032 battery included
- SHAKE AWAKE TECHNOLOGY - Extends battery life by deactivating the optic's LED while not in use; Shake Awake offers settings from 10 minutes to 12 hours depending on the model and can be deactivated altogether if preferred; The slightest touch of the optic instantly reactivates the LED so your Holosun sight for rifle is ready when needed
- MULTILAYER REFLECTIVE GLASS - This red dot sight for rifle is manufactured using optical-quality glass lenses with multilayer coatings applied to facilitate maximum light transmission and wear resistance while reducing glare and facilitating reduced power requirements; Holosun's highly reflective coatings produce industry-leading reticle intensity, clarity, and battery efficiency
- SUPER LED - This micro sight for rifle is equipped with Holosun Super LED technology that provides a versatile range of reticle intensity settings; Holosun Super LEDs have ultra-efficient power usage creating battery like as high as 50,000 hours
- SPECIFICATION - Reticle: Red 2 MOA; Light Wavelength: 650nm; Magnification: 1x; Parallax Free & Unlimited Eye Relief; Power Source: Solar & Battery; Battery Type: CR2032; Battery Life (Hours): 50000; Brightness Setting: 10 DL & 2 NV; Window Size: 20mm Diameter; Housing Material: 6061 T6 Aluminum; Adjustment per Click: 0.5 MOA; W&E Travel Range: 50 MOA; Black Finish
Brand: HOLOSUN
Color: Black
Style: Red 2 MOA Dot
Sport: Hunting
Item Weight: 4.32 ounces
Material: Aluminum
Magnification Maximum: 1 x
Objective Lens Diameter: 20 Millimeters
Magnification Minimum: 1 x
Compatible Devices: Rifle
Brand: HOLOSUN
Color: Black
Style: Red 2 MOA Dot
Sport: Hunting
Item Weight: 4.32 ounces
Material: Aluminum
Magnification Maximum: 1 x
Objective Lens Diameter: 20 Millimeters
Magnification Minimum: 1 x
Compatible Devices: Rifle
Mounting Type: Lower 1/3 Co-witness Mount, Low Profile Mount
Night vision: Yes
Weight: 0.9 Pounds
Model Name: HS403B
Manufacturer: Holosun
Reticle Type: Single Dot
UPC: 760921087428
Global Trade Identification Number: 28
Item Package Dimensions L x W x H: 4.72 x 3.66 x 3.11 inches
Package Weight: 0.34 Kilograms
Item Dimensions LxWxH: 6 x 6 x 4 inches
Brand Name: HOLOSUN
Country of Origin: China
Warranty Description: 2 Year Manufacturer
Suggested Users: unisex-adult
Number of Items: 1
Part Number: HS403B
Included Components: Product
Date First Available: February 6, 2016
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Mar 13
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Color: Black
Style: Red 2 MOA Dot
Holosun has a well-deserved reputation for making quality red dot optics and the HS403B lives up to that reputation. It's attractive, very rugged, fairly easy to install and simple to operate. It has a wide range of adjustment for both windage and elevation, making it suitable for an equally wide range of firearms. The battery life is impressive and the "shake awake" auto-activation feature works exactly as advertised. Once zeroed, it holds zero without any issues. The red dot is crisp and easily visible. Its brighter settings are fully sufficient to make the dot visible in bright sunlight. My only complaint about this optic, and it's a very minor one, is that a basic 2 MOA red dot is the only reticle available. It would be nice to be able to select an "EOTech-style" reticle with a 2 MOA dot inside of a 65-68 MOA circle as an option. Given the sub-$200 price point for the HS403B, however, multiple reticle options is probably a bit much to ask. The simple red dot is sufficient for most shooting situations and the optic is, overall, an excellent bargain.
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Reviewed in the United States on June 29, 2024 by R. MCCOOL
Color: Black
Style: Green 2 MOA Dot
Have several of these. Work great and priced right.
Reviewed in the United States on October 21, 2025 by Gator Pit of Texas, LP
Color: Black
Style: Red 2 MOA Dot
UPDATE: Still solid, no issues whatsoever. Red dot looks just as new as the first day, haven’t had any problems losing my zero or with the battery. I am thinking of eventually buying an aimpoint t2 just because is one the best rds you can get but it comes at a higher price. For now this holosun will keep on doing! Have shot it about twice now and 200 rounds later. Pretty accurate and easy to zero in. Have no trouble hitting targets at 50 or 75 yards. The dot is very clear, even in harshlight where the sun is at its brightest. Its affordable but it doesn’t feel like a cheap rds. Although I want to upgrade to an eotech holographic sight, this rds has been very nice and enjoyable to shoot with. Currently shooting a DD m4v7.
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Reviewed in the United States on August 1, 2021 by Yordani Yordani
Color: Black
Style: Red 2 MOA Dot
This is my second Holosun red dot. I bought a 507k x2 red dot for Sig 364xl, which fit perfectly and works great. Okay, on to this red dot. This was exactly what I needed, in the price point, for my .30 cal M1 carbine. It comes with a riser rail attachment, but I removed it and mounted it directly to my rail. The brightness can be adjusted up or down as needed and the glass is clear. I like where the buttons are placed and battery replacement is easy. I haven’t had it long, so I can not speak to battery life. I can tell you it is a solid and well made little sight. And I hear the owner is moving the company to the US for manufacturing in the near future.
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Reviewed in the United States on January 30, 2021 by LHowell
Color: Black
Style: Red 2 MOA Dot
If your like me, I really try and do my homework on optics, I have a few of these. This is one that keeps popping up with mostly great reviews. Most everything I read it is "its great but not aimpoint great". The biggest difference I can tell is durability. The metal that is used is 6061-t6 and not 7075. Yea its a strong metal but your top tier optics are using 7075. The question is how far down the scale of durability does the optic go. I have put mine through a lot and it has done great. Lets just say it has gotten bumped around a ton to say the least, so take this contradiction for what it is. I am not a fan of the circles, hash marks or what ever (keep it simple). I just want a dot and I want it to stay where I need it and on when I need it. Truthfully, it has done that and I can't complain. But I do not have it on something that is my "go to". Even though I use it, I can not help but have a sense of distrust every time I use it. Sorry not sorry. If you need to "trust" an optic, like it or not this optic wont do it. It can't because it is not proven. And the YouTube video of the Holosun getting shot with a shot gun, I do not know what that is suppose to prove, but it is not durability that I need shown. For those that LARP, 3 gun, target shoot this is perfect and will serve you well. The home defense you will be fine also but I think your go two stuff needs to be proven. If you are going to where lead is being thrown on a daily basis, do yourself a favor and spend extra on a name brand. Can this probably be make it, yea most likely. IMO Aimpoint, Trijicon have countless of stories of optics being blown up, used, abuse and those things keep shining. Like it or not they are leading in the optic industry. Where it shines: If you need a backup gun and just need something for the just incase, I think this is good, even ideal. But like it or not it is still made from China, I have heard that there can be an lense issue. Which looking at it the lense, I believe it. It just feels cheap. BUT, like I said mine has been used and likely more then most and it has been great. It is worth giving this a try at the very least. If you are putting this on something you need to really "trust" then you should be training with it anyways. It is worth trying it out.
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Reviewed in the United States on January 16, 2020 by MD