Holosun HS403C 2 MOA Solar Red Dot Sight with Shake Awake
The Holosun HS403C is a compact, lightweight rifle red dot that keeps things simple but very reliable. It uses a crisp 2 MOA red dot that’s fast to pick up, and it’s powered by both a battery and solar backup so it keeps running even if the battery dies or light conditions are good. It also has shake-awake tech, so it turns on the moment you move your rifle and goes to sleep when you don’t. Built from durable aluminum and designed for AR-style rifles, it’s basically a “mount it and forget it” optic that just works for training, range days, or general use.
-Nathan (Technical Advisor)
Crafted from high-grade 6061 aluminum, the HS403C’s housing is built to withstand rugged use while offering flexibility with its included lower 1/3 co-witness mount (1.63”) and low mount (.75”), accommodating different rifle setups and ensuring optimal sight alignment. Its unique feature of ambient light utilization allows the sight to remain powered even without a battery, ensuring readiness at all times.
User-friendly digital buttons facilitate swift adjustment of settings, enhancing operational efficiency. Protective rubber lens covers shield the optics from debris and impact, while the side-mounted battery tray provides convenient access to the 2032 battery, simplifying maintenance and ensuring continuous functionality.
Ideal for shooters of all levels, from novices to seasoned professionals, the HS403C embodies versatility and reliability, making it a preferred choice for those seeking cutting-edge technology and uncompromising performance in their optics.
- Window Size 20mm Diameter
- Dimension (in) 2.45×1.43×1.6
- 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℃~70℃
- Working Temperature -30℃~60℃
- Submersion IP67
- Vibration 1000G
HS403C is a solar and battery powered 20mm micro sight designed for rifle and carbine applications. HS403C 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.
HS403C is unique in that it is always on and ready. If there is ambient light available it will power the HS403C even without a battery. Additional features include digital buttons for setting changes, rubber lens covers, and a side-mounted battery tray for the 2032 battery. HS403C is a versatile sight for users of all levels.
- Holosun HS403C 2 MOA Solar Red Dot Sight with Shake Awake
- Lower 1/3 Cowitness Mount
- Low Profile Mount
- T10 L Key
- Rubber Cover
- User Manual
- CR2032 Battery
- Lens Cloth
1. What does the HS403C do?
It’s a micro red dot sight designed for rifles and carbines to help with fast target acquisition.
2. What does 2 MOA mean?
It refers to the size of the dot—small enough for precision but still quick to see.
3. Does it use a battery or solar power?
Both. It runs on a CR2032 battery and also uses solar power as backup or in good lighting.
4. How long does the battery last?
Up to around 50,000 hours depending on brightness settings.
5. What is shake-awake?
It’s a motion sensor that turns the optic on when you move it and puts it to sleep when idle.
6. Is it good for AR-15 style rifles?
Yes, it’s designed specifically for AR platforms and similar carbines.
7. How tough is it?
It’s built from aluminum and rated for shock, weather, and hard use.
8. Does it have night vision settings?
Yes, it includes low brightness modes compatible with night vision use.
9. Is it better than a basic red dot?
Yes, mainly because of solar backup and shake-awake, which reduce maintenance and downtime.
10. What’s the main advantage?
It’s a simple, rugged optic with long battery life and automatic power features so you don’t have to think about it much once it’s set up.
- Holosun 10 years / product lifetime warranty. Read more here