The HS510C is a versatile open reflex optic designed for long gun applications. HS510C is at home on carbines, PCCs, and shotguns due its durable design. HS510C features and aluminum housing with titanium hood for added shock resilience and includes a QD absolute co-witness mount (1.41” dot height).
HS510C is packed with Holosun innovation including Solar Failsafe, Shake Awake, MRS (Multi-Reticle System), Red Super LED with up to 50k hour battery life, with 10 daylight and 2 night vision compatible intensity settings. A lower 1/3 co-witness spacer is available separately from Holosun dealers that increases the dot height to 1.63”.

Solar Failsafe™
Shake Awake™
Multiple Reticle System
Multilayer Reflective Glass
Solar Failsafe Technology is one of many innovations featured on solar-equipped Holosun optics. With Solar Failsafe, if your battery fails you always have a backup power source when natural or artificial light is available. Solar Failsafe is activated while in Auto Mode where reticle intensity is automatically adjusted based on the amount of light the solar cell receives. In brighter conditions you have a brighter reticle and in lower-light conditions the reticle will step down in intensity to match any lighting conditions. On models equipped with a super capacitor, it is possible to run the optic, indefinitely, in daytime and night conditions, by maintaining a charge through the Solar Failsafe System all without a battery.
Holosun 510C HM3X Green MRS HE510C-GR-HM3X

| Window Size (in) | 0.91x1.26 |
| Dimension (in) | 3.3x1.68x1.78 |
| Weight (oz) | 4.94 |
| Housing Material | Aluminum & Titanium Hood |
| Surface Finish | MAO |
| Adjustment per Click | 0.5 MOA |
| W&E Travel Range | ±50 MOA |
| Storage Temperature | -40℃~70℃ |
| Working Temperature | -30℃~60℃ |
| Submersion | IP67 |
| Vibration | 1000G |
The HM3X is an aluminum bodied 3X magnifier designed for use in conjunction with a red dot sight. The HM3X is feature-packed and includes a quick release, ambidextrous, flip-to-side Picatinny rail mount. Holosun includes a spacer with the HM3X that provides compatibility with absolute and lower 1/3 co-witness dot heights for maximum compatibility. The HM3X has a generous 2.75” of eye relief, is IP67 certified water resistant, and includes windage and elevation adjustment for precision zeroing to your optic’s zero. The HM3X also includes a built-in flat driver tool for easy adjustments.
Does not use batteries.


| Power Source | N/A |
| Battery Type | N/A |
| Battery Life (Hours) | N/A |
| Thermal Modes | N/A |
| Digital Modes | N/A |
| Video Recording | N/A |
| Screen Refresh Rate | N/A |
| Digital Screen | N/A |
| Brightness Setting | N/A |
| Window Size (in) | N/A |
| Dimension (in) | 3.9 x 1.7 x 2.5 |
| Weight (oz) | 9.8 |
| Housing Material | Durable Aluminum |
| Surface Finish | MAO |
| Adjustment per Click | N/A |
| W&E Travel Range | N/A |
| Storage Temperature | -21℃~60℃ |
| Working Temperature | -21℃~60℃ |
| Submersion | IP67 |
| Vibration | 1000G |
| Digital Zoom | N/A |
| Transmittance | 75% |
| Diopter | NA |
| Field of View | 7 Degree |
| Eye Relief | 70mm |
| Exit Pupil | 7.6mm |
| Magnification | 3X |