Description
The Holosun HE510C-GR + HM3X Magnifier Combo is Holosun’s wide-window open reflex sight for carbines, PCCs and shotguns. It runs a 2 MOA dot / 65 MOA circle Multi-Reticle System with a solar panel backing up a side-loading CR2032 battery, and mounts directly to a Picatinny rail. It is sold as a combo with the Holosun HM3X 3x flip-to-side QD magnifier. The reticle is Multi-Reticle System: 2 MOA dot / 65 MOA circle / circle-dot, green (540 nm). Suits AR-style and straight-pull rifles, pistol-calibre carbines and shotguns where fast close-range target acquisition matters. Specifications below are from the manufacturer’s published data.
Key specifications
- Reticle: Multi-Reticle System: 2 MOA dot / 65 MOA circle / circle-dot, green (540 nm)
- Type: Open reflex sight, Multi-Reticle System (2 MOA dot / 65 MOA circle), parallax free, unlimited eye relief
- Window: 0.91″ x 1.26″ (23 x 32 mm)
- Housing: Aluminium body with titanium hood, MAO finish
- Mount: Direct mount, Picatinny rail
- Battery: CR2032, side tray
- Battery life: Up to 50,000 hours (setting 6)
- Solar failsafe: Yes
- Brightness settings: 12 (10 daylight, 2 night vision)
- Power features: Solar Failsafe, Shake Awake, auto off, memory, manual and automatic brightness, lockout mode
- Click value: 0.5 MOA
- Adjustment range: ±50 MOA windage and elevation
- Operating temperature: -30°C to 60°C
- Dimensions: 3.3″ x 1.68″ x 1.78″ (84 x 43 x 45 mm)
- Weight: 4.94 oz (140 g)
- Magnification: 1x
- Shock rating: 5000G vibration (per HE510C-GR page)
- Waterproof: IP67
- Combo includes: HM3X aluminium 3x magnifier: 70 mm eye relief, 7° FOV, flip-to-side QD mount, absolute and lower 1/3 spacer, 4″ x 1.7″ x 2.5″, 9.8 oz (278 g), IPX67
- Warranty: Metal housing and optical system: lifetime of the product; LED illumination: 10 years from manufacture (registration required)
- In the box: Sight, lens cloth, multi-tool, manual, warranty card
Frequently asked questions
What reticle does the Holosun HE510C-GR have?
Multi-Reticle System: 2 MOA dot / 65 MOA circle / circle-dot, green (540 nm), per the holosun.com specification page.
Is the HS510C waterproof?
Holosun rates it IP67. It also has a solar failsafe panel so the reticle stays on if the battery is flat.
Do I need a firearms licence to buy this optic?
No. Optics and mounts are not controlled items in Australia and ship Australia-wide from 3 Gun Tactical, Tingalpa QLD.
3 Gun Tactical, Tingalpa QLD — Licensed Firearms Dealer 50001578. Optics, mounts and accessories can be purchased without a firearms licence and are shipped Australia-wide. Source: Holosun.








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