The Holosun HS507C X2 Red Dot Sight with the ACSS Vulcan reticle (HS507C-X2-ACSS) is a 1x open-reflex pistol red dot sight on the Trijicon RMR footprint, with a fixed 10 MOA red chevron inside a large guidance circle, behind a 0.63 × 0.91 in (16.0 × 23.1 mm) window. UPC 810047071143.
The ACSS Vulcan reticle is Primary Arms' answer to the compromise between speed and precision: the outer circle catches the eye and drags it back to centre for fast reacquisition, while the tip of the chevron gives a finer hold than a round dot at distance. Everything behind the glass is standard 507C X2 — a 7075-T6 aluminium housing finished in Hard Anodized black, Solar Failsafe supplemental power, Shake Awake motion activation and a side-loading CR1632 rated to 50,000 hours.
How It Compares
The standard HS507C X2 red dot sight uses Holosun's switchable Multi-Reticle System instead of the fixed chevron. In green, see the HE507C X2 green dot sight with the ACSS Vulcan reticle. On a narrower slide, the HS507K X2 with the ACSS Vulcan reticle carries the same reticle on the RMSc footprint. For a plain dot, the HS407C X2 red dot sight is the simplest option on this footprint. Browse all RMR footprint red dot sights and the wider Holosun pistol red dot sight range.
Ideal For
- Section 1 long-barrelled pistols and revolvers held on a UK firearm certificate
- Pistol-calibre carbines where the chevron tip is wanted for shots past close range
- Practical and gallery rifle competition on an RMR-pattern mount
- Airsoft GBB pistol builds and training guns used outdoors year-round
Key Features
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Reticle: ACSS Vulcan — fixed 10 MOA red 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: 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 and 5000G rated
Technical Specifications
| Optic Type |
Open reflex pistol red dot sight, 1x (non-magnified) |
| Reticle |
ACSS Vulcan — 10 MOA chevron inside a guidance circle |
| Reticle Colour |
Red |
| Illumination |
Red 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 ±50 MOA elevation |
| Parallax |
Parallax-free |
| Dimensions |
1.78 × 1.15 × 1.15 in (45.2 × 29.2 × 29.2 mm) |
| Weight |
1.5 oz (43 g) |
| Housing / Finish |
7075-T6 aluminium, Hard Anodized black |
| Water Resistance |
IP67 water and dust resistant |
| Vibration Rating |
5000G |
| Warranty |
Limited Lifetime Warranty |
| MPN / UPC |
HS507C-X2-ACSS / 810047071143 |
What's Included
- Holosun HS507C-X2-ACSS red 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 HS507C X2?
The ACSS Vulcan is a Primary Arms reticle that pairs a 10 MOA chevron aiming point with a large surrounding guidance circle. On the Holosun HS507C X2 ACSS the circle pulls the eye back to centre for fast reacquisition up close, while the tip of the chevron gives a finer hold than a round dot would at distance.
Is the Holosun HS507C X2 ACSS an RMR or an RMSc footprint optic?
The Holosun HS507C X2 ACSS uses the Holosun 507C footprint, which is the Trijicon RMR pattern. It fits RMR-cut slides and optics-ready pistols supplied with an RMR-pattern adapter plate. The RMSc-footprint version of the same reticle is the HS507K X2 ACSS.
How is the ACSS Vulcan version different from the standard HS507C X2?
The Holosun HS507C X2 ACSS uses a fixed 10 MOA chevron inside a guidance circle and cannot be switched to a plain dot. The standard HS507C X2 uses Holosun's Multi-Reticle System, which switches between a 2 MOA dot, a 32 MOA circle and a circle-dot.
What do Solar Failsafe and Shake Awake do on the HS507C X2 ACSS?
Solar Failsafe draws supplemental power from ambient light and keeps the reticle lit if the CR1632 cell fails. Shake Awake switches the reticle off when the Holosun HS507C X2 ACSS has been still and restores it instantly on movement, which together support the 50,000-hour runtime rating.
What battery does the Holosun HS507C X2 ACSS use and how is it changed?
The Holosun HS507C X2 ACSS uses one CR1632 cell in a side-loading tray, so the battery can be replaced with the optic still mounted and zeroed.
How tough is the Holosun HS507C X2 ACSS?
The Holosun HS507C X2 ACSS has a 7075-T6 aluminium housing with a Hard Anodized black finish, is rated IP67 for water and dust, and is tested to 5000G of vibration, at a weight of 1.5 oz (43 g).
