The Holosun HE510C Green Dot Sight (HE510C-GR) is a 1x open reflex rifle green dot sight with the Multi-Reticle System — a 2 MOA green dot, a 65 MOA circle, or both together as a circle-dot — behind a 30 mm objective lens, in an aluminium housing with a titanium protective hood, weighing 4.94 oz (140 g).
It is the green-reticle version of the 510C, the wide-window open reflex sight that became a default choice on AR-pattern carbines. The large rimless window gives a genuinely heads-up, both-eyes-open sight picture, and many shooters find a green emitter easier to pick up in bright daylight than red. Solar Failsafe powers the dot from available light and keeps it lit if the CR2032 dies, Shake Awake sleeps the optic when it is still, and adjustment is 0.5 MOA per click with ±50 MOA of travel. The housing is rated IP67.
How It Compares
The red version is the HS510C red dot sight, also available in HS510C red in Flat Dark Earth and HS510C green in Flat Dark Earth. For a fully enclosed titanium sight with the same reticle set in green, see the HE512T green dot sight. For magnified reach behind it, add the HM3X 3x flip-to-side magnifier or the HM6X 6x magnifier, or buy the red sight and magnifier together as the HS510C and HM3X combo. Browse all Holosun rifle red dot sights, the full Holosun green dot sight range and our shotgun red dot sights.
Ideal For
- Civilian Service Rifle and practical rifle on straight-pull AR-pattern carbines
- Practical shotgun and 3-Gun, where the 65 MOA circle drives fast close hits
- Bright-daylight shooting, where a green reticle holds up better than red
- Pistol-calibre carbines and rimfire rifles running a Picatinny rail
Key Features
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Reticle: green Multi-Reticle System — selectable 2 MOA dot, 65 MOA circle, or circle-dot
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Window: wide rimless open reflex window over a 30 mm objective lens
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Electronics: Solar Failsafe supplemental power plus Shake Awake motion activation
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Illumination: 12 brightness settings — 10 daylight and 2 night-vision compatible
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Battery: CR2032, up to 50,000 hours of runtime
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Adjustment: 0.5 MOA per click, ±50 MOA windage and elevation
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Housing: aluminium with a titanium protective hood, IP67 rated
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Weight: 4.94 oz (140 g)
Technical Specifications
| Optic Type |
Open reflex rifle green dot sight, 1x (non-magnified) |
| Reticle |
Multi-Reticle System — 2 MOA dot / 65 MOA circle / circle-dot |
| Reticle Colour |
Green |
| Objective Lens |
30 mm |
| Illumination |
12 brightness settings — 10 daylight / 2 night-vision compatible |
| Battery |
CR2032, up to 50,000 hours |
| Power |
Battery with Solar Failsafe supplemental power |
| Power Management |
Shake Awake motion activation |
| Click Value |
0.5 MOA per click |
| Adjustment Range |
±50 MOA windage and elevation |
| Eye Relief |
Unlimited (non-critical eye relief) |
| Housing / Hood |
Aluminium housing with titanium protective hood |
| Finish Options |
Matte Black / Flat Dark Earth |
| Water Resistance |
IP67 water and dust resistant |
| Weight |
4.94 oz (140 g) |
| MPN |
HE510C-GR |
What's Included
- Holosun HE510C-GR green dot sight with integrated Picatinny mount
- Lens cloth, multi-tool and user manual
Warranty
Covered by Holosun's manufacturer warranty, handled in the UK by Xtreme Tactical.
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Holosun's warranty.
Frequently Asked Questions
What reticle options does the Holosun HE510C have?
The Holosun HE510C Green Dot Sight uses the Multi-Reticle System, which switches between a 2 MOA green dot on its own, a 65 MOA circle on its own, and both together as a circle-dot. The 65 MOA circle is the fast reference at close range and the 2 MOA dot is the precise one.
Why choose the green HE510C over the red HS510C?
Many shooters find a green emitter easier to pick up in bright daylight, because the eye is more sensitive to green than to red at the same output. The trade is that a green LED draws marginally more current than a red one at the same setting.
What do Solar Failsafe and Shake Awake do on the HE510C?
Solar Failsafe powers the reticle from available light and keeps it lit if the CR2032 fails. Shake Awake switches the reticle off when the Holosun HE510C has been still and restores it instantly on movement, which together support the 50,000-hour runtime rating.
Is the Holosun HE510C suitable for a shotgun?
The Holosun HE510C is an open reflex sight with a wide window and a 65 MOA circle that suits fast target pick-up, which is why the 510C family is a common choice for practical shotgun in the UK. It needs a Picatinny rail section on the receiver or rib to mount to.
Can I use a magnifier behind the Holosun HE510C?
Yes. A flip-to-side magnifier such as the Holosun HM3X or HM6X mounts on the rail behind the Holosun HE510C, giving magnified target identification that swings aside for close work at 1x.
Is the Holosun HE510C night-vision compatible?
Yes. Two of the twelve brightness settings on the Holosun HE510C are night-vision compatible, so the green reticle can be dimmed far enough to use behind a night vision device.
