The Holosun HE507C X2 Green Dot Sight with the ACSS Vulcan reticle (HE507C-GR-X2-ACSS) is a 1x open-reflex pistol green dot sight on the Trijicon RMR footprint, with a fixed 10 MOA green chevron inside a large guidance circle, behind a 0.63 × 0.91 in (16.0 × 23.1 mm) window.
It is the green-emitter version of Holosun's ACSS Vulcan pistol optic. The guidance circle draws the eye straight back to the aiming point for fast reacquisition, the chevron tip gives a finer hold than a round dot, and a green emitter reads brighter to the eye than red at the same output. The housing is 7075-T6 aluminium finished in Hard Anodized black, with Solar Failsafe supplemental power, Shake Awake motion activation and a side-loading CR1632 tray rated to 50,000 hours.
How It Compares
The red version is the HS507C X2 red dot sight with the ACSS Vulcan reticle. For a switchable circle-dot in green instead of the fixed chevron, see the HE507C X2 green dot sight, or the HE407C X2 green dot sight for a single 2 MOA dot. On a narrower slide, the HE507K X2 with the ACSS Vulcan reticle is the RMSc-footprint equivalent. Browse the full Holosun green dot sight range and all RMR footprint red dot sights.
Ideal For
- Section 1 long-barrelled pistols and revolvers held on a UK firearm certificate
- Pistol-calibre carbines where the chevron tip earns its keep past close range
- Shooters who see a green reticle more clearly than red against dark backgrounds
- Airsoft GBB pistol builds and skirmish training platforms
Key Features
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Reticle: ACSS Vulcan — fixed 10 MOA green chevron inside a large guidance circle
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Window: 0.63 × 0.91 in (16.0 × 23.1 mm) viewing window
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Footprint: Holosun 507C (Trijicon RMR) footprint
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Illumination: green LED, 12 brightness settings — 10 daylight and 2 night-vision compatible
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Electronics: Solar Failsafe supplemental power plus Shake Awake motion activation
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Battery: side-loading CR1632 tray, up to 50,000 hours of runtime
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Adjustment: 1 MOA per click, ±50 MOA windage and elevation, parallax-free
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Housing: 7075-T6 aluminium, Hard Anodized black finish, IP67 rated
Technical Specifications
| Optic Type |
Open reflex pistol green dot sight, 1x (non-magnified) |
| Reticle |
ACSS Vulcan — 10 MOA chevron inside a guidance circle |
| Reticle Colour |
Green |
| Illumination |
Green LED, 12 brightness settings — 10 daylight / 2 night-vision compatible |
| Footprint |
Holosun 507C (Trijicon RMR) footprint |
| Window Size |
0.63 × 0.91 in (16.0 × 23.1 mm) |
| Battery |
CR1632 in a side-loading tray, up to 50,000 hours |
| Power |
Battery with Solar Failsafe supplemental power |
| Power Management |
Shake Awake motion activation |
| Click Value |
1 MOA per click |
| Adjustment Range |
±50 MOA windage and elevation |
| Parallax |
Parallax-free |
| Weight |
1.5 oz (43 g) |
| Housing / Finish |
7075-T6 aluminium, Hard Anodized black |
| Water Resistance |
IP67 water and dust resistant |
| Warranty |
Limited Lifetime Warranty |
| MPN |
HE507C-GR-X2-ACSS |
What's Included
- Holosun HE507C-GR-X2-ACSS green dot sight
- Multi-tool, lens cloth and user manual
Warranty
Covered by Holosun's manufacturer warranty — stated as a Limited Lifetime Warranty for this model — 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 is the ACSS Vulcan reticle on the Holosun HE507C X2?
The ACSS Vulcan is a Primary Arms reticle that combines a 10 MOA chevron aiming point with a large surrounding guidance circle. On the Holosun HE507C X2 ACSS the circle leads the eye to the chevron tip for fast reacquisition up close, while the chevron itself gives a more precise hold at distance than a round dot.
Is the Holosun HE507C X2 ACSS an RMR or an RMSc footprint optic?
The Holosun HE507C X2 ACSS uses the Holosun 507C footprint, which is the Trijicon RMR pattern, so it fits RMR-cut slides and RMR-pattern adapter plates. The RMSc-footprint version of the same reticle is the HE507K X2 ACSS.
Why choose the green ACSS Vulcan over the red one?
The eye is more sensitive to green than to red at the same output, so the chevron on the Holosun HE507C X2 ACSS generally appears brighter and better defined than the red version for the same power draw. It is the usual pick for dark and woodland backgrounds, and for shooters with a mild red-green colour deficiency.
What do Solar Failsafe and Shake Awake do on the HE507C X2 ACSS?
Solar Failsafe takes supplemental power from ambient light and keeps the green reticle lit if the CR1632 fails. Shake Awake sleeps the reticle when the Holosun HE507C X2 ACSS has been still and wakes it instantly on movement, which together support the 50,000-hour runtime rating.
What battery does the Holosun HE507C X2 ACSS use and how is it changed?
The Holosun HE507C X2 ACSS uses one CR1632 cell in a side-loading tray, so it can be replaced with the optic still mounted and zeroed.
Is the Holosun HE507C X2 ACSS weatherproof?
Yes. The Holosun HE507C X2 ACSS has a 7075-T6 aluminium housing with a Hard Anodized black finish and is rated IP67 for water and dust, so rain and a wet range day are not an issue.
