The Holosun HS510C Red Dot Sight (HS510C) is a 1x open reflex red dot sight with Holosun's Multi-Reticle System — a 2 MOA red dot, a 65 MOA circle, or both together as a circle-dot — behind a 0.91 × 1.26 in (23 × 32 mm) window, on an integrated quick-detach Picatinny mount. The housing is finished in black.
Solar Failsafe supplements the side-loading CR2032 with light, and Shake Awake puts the optic to sleep when it is still and wakes it on movement, for up to 50,000 hours of runtime. A titanium protective hood shields the emitter, and the aluminium housing is rated IP67 and tested to 5000G of vibration.
How It Compares
For magnification behind the dot, the HS510C red dot sight and HM3X magnifier combo bundles the same sight with a 3x flip-to-side magnifier. The same optic is available in HS510C red dot sight in Flat Dark Earth and HS510C green dot sight in Flat Dark Earth. For a green reticle in black, see the HE510C green dot sight. Browse all shotgun red dot sights and straight-pull rifle optics.
Ideal For
- Practical shotgun and 3-Gun, where the 65 MOA circle drives fast close-range hits
- Civilian Service Rifle and practical rifle on straight-pull AR-pattern carbines
- Pistol-calibre carbines and rimfire rifles running a Picatinny rail
- Airsoft skirmishing and training guns that live outdoors in poor weather
Key Features
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Reticle: Red Multi-Reticle System — selectable 2 MOA dot, 65 MOA circle, or circle-dot
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Electronics: Solar Failsafe supplemental power plus Shake Awake motion activation with memory function
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Illumination: 12 brightness settings — 10 daylight and 2 night-vision compatible — with manual, automatic and Lockout modes
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Emitter: 650 nm red LED, up to 50,000 hours of battery life
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Housing: aluminium with a titanium protective hood, black MAO finish, IP67 rated
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Mount: integrated quick-detach Picatinny mount at 1.41 in (35.8 mm) co-witness dot height
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Battery: side-loading CR2032 tray, changeable without removing the optic
Technical Specifications
| Optic Type |
Open reflex red dot sight, 1x (non-magnified) |
| Reticle |
Multi-Reticle System — 2 MOA red dot / 65 MOA circle / circle-dot |
| Reticle Colour |
Red |
| Light Source |
650 nm red LED |
| Window Size |
0.91 × 1.26 in (23 × 32 mm) |
| Lens Coating |
Multi-coated |
| Parallax |
Parallax-free |
| Eye Relief |
Unlimited (non-critical eye relief) |
| Illumination |
12 settings — 10 daylight / 2 night-vision compatible; manual and automatic modes; Lockout Mode |
| Click Value |
0.5 MOA per click |
| Adjustment Range |
±50 MOA windage and elevation |
| Battery |
CR2032 in a side-loading tray, up to 50,000 hours at brightness setting 6 |
| Solar Support |
Solar Failsafe supplemental power |
| Power Management |
Shake Awake motion activation, auto-off and memory function |
| Mount |
Integrated quick-detach Picatinny mount, 1.41 in (35.8 mm) co-witness dot height |
| Housing / Finish |
Aluminium with titanium protective hood, black MAO finish |
| Water Resistance |
IP67 water and dust resistant |
| Vibration Rating |
5000G |
| Operating Temperature |
-30 °C to 60 °C |
| Length |
3.30 × 1.68 × 1.78 in (84 × 43 × 45 mm) |
| Weight |
4.94 oz (140 g) |
| MPN / UPC |
HS510C / 605930624571 |
What's Included
- Holosun HS510C red dot sight with integrated QD Picatinny mount
- Lens cloth, multi-tool, user manual and warranty card
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 HS510C Red Dot Sight have?
The Holosun HS510C Red Dot Sight uses the Multi-Reticle System, which switches between a 2 MOA red dot on its own, a 65 MOA circle on its own, and both together as a circle-dot. The 65 MOA circle is the fast option for close shotgun and carbine work, and the 2 MOA dot is the precise one.
Is the Holosun HS510C suitable for a shotgun?
Yes. The Holosun HS510C has an integrated quick-detach Picatinny mount, an open window that keeps both eyes working, and a 65 MOA circle that suits fast target pick-up, which is why the HS510C family is a common choice for practical shotgun in the UK. It needs a Picatinny rail section on the receiver or rib.
How long does the battery last on the Holosun HS510C?
The Holosun HS510C runs up to 50,000 hours on a single CR2032 at brightness setting 6. Solar Failsafe adds supplemental power in daylight and will keep the sight running if the cell fails, and Shake Awake shuts the reticle off when the gun is still.
Will the Holosun HS510C co-witness with AR-pattern iron sights?
Yes. The integrated quick-detach mount on the Holosun HS510C sets the dot at 1.41 in (35.8 mm), Holosun's stated co-witness dot height, so AR-height iron sights line up in the window on a standard flat-top receiver.
Is the Holosun HS510C night-vision compatible?
Yes. Two of the twelve brightness settings on the Holosun HS510C are night-vision compatible, so the reticle can be dimmed far enough to use behind a night vision device.
Can I change the battery on the Holosun HS510C without losing zero?
Yes. The Holosun HS510C uses a side-loading CR2032 tray, so the cell can be replaced with the optic still mounted and zeroed.
