The Holosun HE510C in green, part number HE510C-GR, is a 1x open reflex rifle sight with the Multi-Reticle System behind a 0.91 x 1.26 in (approximately 23 x 32 mm) window.
The reticle is switchable: a 2 MOA green dot on its own for a precise hold, a 65 MOA circle on its own for speed at close range, or both together, changed with a button rather than a menu.
The housing is aluminium with a titanium protective hood over the glass, finished in MAO black, rated IP67 and weighing 4.94 oz (140 g) at 3.3 x 1.68 x 1.78 in. Holosun supplies a quick-detach Picatinny mount that puts the optic at 1.41 in. Illumination has 12 settings, 10 for daylight and 2 for night vision, adjustment is 0.5 MOA per click across ±50 MOA, and a CR2032 is rated for up to 50,000 hours at setting 6 with Solar Failsafe and Shake Awake supporting it.
The wide rimless window is the reason the 510 pattern became a default on AR-pattern carbines and practical shotguns: it gives a genuinely heads-up picture with both eyes open. A green emitter is easier for most eyes to see in bright light than red, at the cost of drawing marginally more current at the same setting. This part number is supplied in the MAO black finish only.
Why shooters choose the HE510C
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Reticle — green Multi-Reticle System — 2 MOA dot, 65 MOA circle, or circle dot
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Window — wide rimless open reflex window, 0.91 x 1.26 in
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Power — CR2032 with Solar Failsafe and Shake Awake, up to 50,000 hours at setting 6
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Illumination — 12 settings — 10 daylight and 2 night vision compatible
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Adjustment — 0.5 MOA per click across ±50 MOA
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Build — aluminium with a titanium hood, IP67, 4.94 oz (140 g)
What the HE510C fits
It comes on a quick-detach Picatinny mount at 1.41 in optic height, so the rifle or shotgun needs a MIL-STD-1913 rail section to take it, with room behind if you intend to run a magnifier. For a fully enclosed titanium sight with the same reticle set in green, see the HE512T green; the red equivalent of that sight is the HE512T red, and this sight is sold with a magnifier as the HE510C and HM3X combo.
Specifications
| Type |
Open reflex rifle sight, 1x |
| Reticle |
Multi-Reticle System — 2 MOA dot / 65 MOA circle / circle dot |
| Reticle Colour |
Green, 540nm |
| Window Size |
0.91 x 1.26 in (approx. 23 x 32 mm) |
| Illumination |
12 settings — 10 daylight / 2 night vision |
| Battery |
CR2032, up to 50,000 hours at setting 6 |
| Power |
Solar Failsafe supplemental power, Shake Awake |
| Click Value |
0.5 MOA per click |
| Adjustment Range |
±50 MOA windage and elevation |
| Mount |
Quick-detach Picatinny, 1.41 in optic height |
| Housing |
Aluminium with titanium hood, MAO finish, IP67 |
| Dimensions |
3.3 x 1.68 x 1.78 in |
| Weight |
4.94 oz (140 g) |
| MPN |
HE510C-GR |
A wide green window with three reticles behind one button. Order the HE510C today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Green Dot Sights, HE510C and HM3X Combo or browse all Holosun.
