The Holosun HS510C + HM3X combo is a complete red dot sight and magnifier package — everything you need to run fast at 1× and reach out to distance, in one box and at a price that undercuts buying the two separately. The HS510C is a wide-window open reflex sight with a titanium hood and Holosun's Solar Failsafe, which tops up the battery in daylight and keeps the dot lit even if the cell dies.
Its Multi-Reticle System (MRS) lets you select a 2 MOA dot, a 65 MOA circle, or the circle-dot combination at the press of a button. Flip the HM3X 3× magnifier into place on its quick-detach mount for positive target ID at range, then swing it aside for close work. Shake Awake powers the optic down when it sits still and wakes it the instant you move. UK-stocked for fast dispatch.
Ideal For
- Close to mid-range shooting applications
- Rapid target acquisition with optional magnification
- Dynamic shooting and range use
- Users requiring a versatile optic + magnifier setup
Key Features
- HS510C open reflex sight with wide field of view
- HM3X 3× magnifier with flip-to-side functionality
- Multi-Reticle System (2 MOA Dot, 65 MOA Circle, Circle-Dot)
- Solar Failsafe with automatic brightness adjustment
- Shake Awake motion activation technology
- Titanium hood for added durability (HS510C)
- Quick-detach mounting system for both optic and magnifier
- Adjustable diopter on magnifier for clarity
- Compatible with standard Picatinny rails
Technical Specifications
| Brand |
Holosun |
| Model |
HS510C + HM3X Combo |
| MPN |
HS510C+HM3X |
| UPC |
605930625721 |
| Optic Type |
Reflex Sight + Magnifier Combo |
| Magnification (Magnifier) |
3× |
| Reticle |
2 MOA Dot & 65 MOA Circle (MRS) |
| Reticle Colour |
Red |
| Illumination Settings |
Multiple Daylight & Night Vision Compatible |
| Power Source |
Battery + Solar (Solar Failsafe) |
| Battery Type |
CR2032 |
| Housing Material |
Aluminium (HS510C), Titanium Hood |
| Magnifier Mount |
Flip-to-Side, Quick Detach |
| Adjustment Type |
Windage & Elevation |
| Night Vision Compatible |
Yes |
| Mount Compatibility |
Picatinny Rail |
What's Included
- Holosun HS510C Reflex Red Dot Sight
- Holosun HM3X 3× Magnifier
- Flip-to-side mount (pre-installed on magnifier)
- Quick-detach mount (optic)
- CR2032 battery
- Adjustment tool
- Lens cloth
- User manuals
UK Delivery & Support
This Holosun HS510C + HM3X combo is UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based aftersales support and Holosun's warranty.
How It Compares
Want the sight or magnifier on their own? See the HS510C standalone or the HM3X magnifier. Prefer a lower-cost pairing? The HS403C + HM3X combo. Browse all red dot + magnifier combos and our magnifier guide.
Frequently Asked Questions
Why buy the combo instead of the sight and magnifier separately?
You get a factory-matched red dot and 3× magnifier at a lower combined price, with the flip-to-side mount already set up to work together.
What do Solar Failsafe and Shake Awake do?
Solar Failsafe uses a solar panel to supplement power and keep the dot lit even if the battery fails; Shake Awake powers the optic down when idle and reactivates it the moment it senses movement, dramatically extending battery life.
What reticle options does the MRS give me?
A 2 MOA dot for precision, a 65 MOA circle for speed, or both combined as a circle-dot — switchable at the press of a button.
Can I move the magnifier out of the way?
Yes — the HM3X sits on a flip-to-side quick-detach mount, so you can swing it aside for unmagnified 1× shooting or remove it entirely.
What rifles does it fit?
Both the sight and magnifier mount to any standard Picatinny rail.
