The Holosun HE510C-GR is the green-reticle version of the iconic 510C — a wide-window open reflex green dot sight that's become a go-to optic for AR-15s and carbines. Many shooters find the green emitter easier to pick up in bright daylight than red, and the large rimless window delivers a genuinely heads-up, both-eyes-open sight picture.
It runs Holosun's Multi-Reticle System (a 2 MOA dot, a 65 MOA circle, or the two combined as a circle-dot), Solar Failsafe that powers the dot from available light and keeps it lit even if the battery dies, and Shake Awake motion activation for years of runtime. A titanium hood protects the emitter.
How It Compares
Prefer a red reticle? See the Holosun HS510C. Want magnified reach for longer shots? Add the HM3X 3x magnifier behind it, or buy them together as the HS510C + HM3X combo. Browse more in Holosun green dots, green dot sights and rifle dot sights.
Ideal For
- Tactical applications
- Duty use
- Competition shooting
- Range shooting
Key Features
- Green circle-dot reticle (2 MOA dot & 65 MOA ring)
- Open reflex sight for a wide field of view
- Solar Failsafe technology
- Shake Awake motion activation
- Durable aluminium housing with titanium hood
- Large viewing window for fast target acquisition
- Up to 50,000 hours battery life
Technical Specifications
| Magnification |
1x |
| Reticle |
Multi-Reticle System (2 MOA dot / 65 MOA circle) |
| Reticle Colour |
Green |
| Finish Options |
Matte Black / Flat Dark Earth (FDE) |
| Objective Lens |
30 mm |
| Eye Relief |
Unlimited |
| Adjustment Per Click |
0.5 MOA |
| Windage / Elevation Range |
±50 MOA |
| Brightness Settings |
10 daylight / 2 night-vision |
| Battery |
CR2032 — up to 50,000 hours |
| Housing / Hood |
Aluminium / Titanium |
| Waterproof Rating |
IP67 |
| Weight |
4.94 oz |
What's Included
- Holosun HE510C-GR Green Dot Sight
- Lower 1/3 co-witness mount
- CR2032 battery
- Adjustment tool
- User manual
UK Delivery & Support
The HE510C-GR is UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based aftersales support and Holosun's warranty.
Frequently Asked Questions
Is a green dot better than a red dot?
Many shooters find green brighter and easier to acquire in daylight, though it draws marginally more battery. Both perform superbly — it's largely preference.
What is the Multi-Reticle System?
At the press of a button you can switch between a 2 MOA dot for precision, a 65 MOA circle for speed, or the circle-dot combined.
Will it co-witness on an AR-15?
Yes — it ships with a lower 1/3 co-witness mount that suits most AR-pattern rifles.
What do Solar Failsafe and Shake Awake do?
Solar Failsafe powers the dot from available light and keeps it lit if the battery fails; Shake Awake sleeps the optic when still and wakes it on movement for years of runtime.
