The Holosun HE507K-GR-X2 is a 1x open-reflex pistol sight on the Holosun K footprint, projecting the Multi-Reticle System in green at 540 nm from a 7075-T6 aluminium housing.
Two reticles in one sight, chosen by the shooter rather than by the factory. The 32 MOA circle is what the eye finds under pressure; the 2 MOA dot inside it is what you use when the shot is worth taking slowly.
The window measures 0.58 x 0.77in (14.7 x 19.6 mm) and the sight weighs 1 oz, rated IP67 and 5000G. Brightness runs to 12 settings, ten for daylight and two for night vision, and adjustment is 1 MOA per click with ±30 MOA of travel. A CR1632 loads from the side of the housing, so the cell changes without unmounting the sight, and Holosun rate it at up to 50,000 hours with Shake Awake sleeping the reticle between uses.
X2 is the generation that added Lock Mode, which disables the buttons once brightness and reticle are set so a holster or a range bag cannot change them for you. Two honest points: there is no solar cell on the K-series, that being a C-series feature, and the emitter is open, so this trades the weather-sealing of an enclosed sight for lower weight and a lower deck height. Holosun write the part number both ways, as HE507K-GR-X2 and HE507K-X2-GR.
Why shooters choose the HE507K X2 Green
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Reticle — green Multi-Reticle System — 2 MOA dot, 32 MOA circle, or circle-dot at 540 nm
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Footprint — Holosun K, the pattern used by slim-slide optics-ready pistols
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Illumination — 12 settings — 10 daylight and 2 night-vision compatible
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Battery — side-loading CR1632 with Shake Awake, up to 50,000 hours
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Controls — X2 Lock Mode holds the brightness and reticle you set
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Build — 7075-T6 aluminium at 1 oz, rated IP67 and 5000G
What the HE507K X2 Green fits
It fits K-footprint slide cuts and K-pattern adapter plates directly; check your slide is the optics-ready variant before ordering, as cuts differ between production runs. For a fixed chevron and ring instead of the circle-dot, there is the HE507K X2 with the ACSS Vulcan reticle. On a full-size RMR-cut slide the equivalent green optic is the HE507C X2, which adds Solar Failsafe, and the wider set sits in green dot sights.
Specifications
| Optic type |
Open reflex pistol sight, 1x |
| Reticle |
Multi-Reticle System — 2 MOA dot / 32 MOA circle / circle-dot |
| Reticle colour |
Green, 540 nm |
| Window |
0.58 x 0.77in (14.7 x 19.6 mm) |
| Footprint |
Holosun K |
| Illumination |
12 settings — 10 daylight / 2 night vision |
| Adjustment |
1 MOA per click, ±30 MOA |
| Battery |
CR1632, side-loading tray, up to 50,000 hours |
| Power management |
Shake Awake and X2 Lock Mode |
| Housing |
7075-T6 aluminium |
| Ratings |
IP67, 5000G |
| Weight |
1 oz |
| Brand |
Holosun |
| MPN |
HE507K-GR-X2 |
A circle when speed decides it, a dot when precision does, and one button lock to keep both where you left them. Order the HE507K X2 Green 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, HE507C X2 Green or browse all Holosun.
