The Holosun HS507C X3 Red Dot Sight (HS507C-X3-RD) is a 1x open-emitter pistol red dot sight on the Holosun 507C / Trijicon RMR footprint, with the Multi-Reticle System — a 2 MOA red dot, a 32 MOA circle, or both together as a circle-dot — in a 7075-T6 aluminium housing weighing 1.5 oz (43 g).
X3 is the third generation of Holosun's full-size pistol optic. The housing has been reworked for better ergonomics and the light sensor now faces forward, so automatic brightness follows the light on the target rather than the light behind the shooter's head. Solar Failsafe backs up the side-loading CR1632, Shake Awake sleeps the reticle when the gun is still, and Lock Mode prevents accidental setting changes.
How It Compares
For a single uncluttered aiming point, the HS407C X3 red dot sight drops the circle. The same Multi-Reticle System is available in HE507C X3 green and HS507C X3 gold. The previous generation, the HS507C X2 red dot sight, shares the footprint and battery, and the HS507 ProMax red dot sight is the larger-window competition option. 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 32 MOA circle speeds up close transitions
- 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: red Multi-Reticle System — selectable 2 MOA dot, 32 MOA circle, or circle-dot
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Platform: X3 housing with a forward-facing light sensor for adaptive brightness
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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, Shake Awake and Lock Mode
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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
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Housing: 7075-T6 aluminium, IP67 rated, 1.5 oz (43 g)
Technical Specifications
| Optic Type |
Open emitter pistol red dot sight, 1x (non-magnified) |
| Reticle |
Multi-Reticle System — 2 MOA dot / 32 MOA circle / circle-dot |
| Reticle Colour |
Red |
| Footprint |
Holosun 507C / Trijicon RMR footprint |
| Illumination |
12 brightness settings — 10 daylight / 2 night-vision compatible |
| Light Sensor |
Forward-facing, for adaptive brightness |
| 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; Lock Mode |
| Click Value |
1 MOA per click |
| Adjustment Range |
±50 MOA windage and elevation |
| Housing |
7075-T6 aluminium |
| Water Resistance |
IP67 water and dust resistant |
| Weight |
1.5 oz (43 g) |
| MPN |
HS507C-X3-RD |
What's Included
- Holosun HS507C-X3-RD red dot sight
- Multi-tool, lens cloth 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 HS507C X3 have?
The Holosun HS507C X3 Red Dot Sight uses the Multi-Reticle System, which switches between a 2 MOA red dot on its own, a 32 MOA circle on its own, and both together as a circle-dot. The circle is the faster reference at close range and the 2 MOA dot is the more precise one.
What footprint does the Holosun HS507C X3 use?
The Holosun HS507C X3 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 rather than an RMSc one.
What is new on the X3 compared with the X2?
The Holosun HS507C X3 has a revised housing with improved ergonomics and a forward-facing light sensor, so automatic brightness is set by the light on the target rather than the light behind the shooter. The Multi-Reticle System, RMR footprint, CR1632 battery and Solar Failsafe carry over from the X2.
Does the Holosun HS507C X3 have Solar Failsafe and Shake Awake?
Yes. Solar Failsafe on the Holosun HS507C X3 takes supplemental power from ambient light and keeps the reticle lit if the CR1632 fails, and Shake Awake switches the reticle off when the pistol has been still and restores it on movement. Together they support the 50,000-hour runtime rating.
What battery does the Holosun HS507C X3 use and how is it changed?
The Holosun HS507C X3 uses one CR1632 cell in a side-loading tray, so the cell can be replaced with the optic still mounted and zeroed.
Is the Holosun HS507C X3 waterproof?
The Holosun HS507C X3 is rated IP67, which covers full dust protection and immersion in water, in a 7075-T6 aluminium housing weighing 1.5 oz (43 g).
