Description
Experience rapid target acquisition and extended battery life with this feature-rich green dot reflex sight engineered for carbines, PCCs, and tactical shotguns.
The Holosun HE510C-GR delivers exceptional visibility in varied lighting conditions through its efficient green LED technology, allowing shooters to maintain target focus without the distraction of battery anxiety. Its open reflex design maximizes your field of view while the dual power system ensures your optic remains operational whether you’re training in bright sunlight or low-light scenarios. The quick-detach mount and absolute co-witness height make this sight adaptable to multiple firearm platforms with backup iron sights.
Key Features
- Multi-Reticle System (MRS): Switch between three reticle options—2 MOA dot only for precision, 65 MOA circle only for rapid acquisition, or combined circle-dot for versatile engagement distances
- Dual Power System: Solar Failsafe technology supplements the CR2032 battery, automatically adjusting brightness based on ambient light while extending operational life up to 50,000 hours (dot only)
- Shake Awake Technology: Motion sensor automatically powers the LED on when movement is detected and shuts off after 10 minutes of inactivity, conserving battery during storage
- Durable Construction: 6061 aluminum housing with Grade 5 titanium protective hood provides enhanced impact resistance while maintaining a lightweight profile at 4.94 ounces
Important Compatibility Notes
- Mounting Requirements: Requires standard Picatinny/Weaver rail (MIL-STD-1913); ideal for AR-platform rifles, carbines, pistol-caliber carbines, and tactical shotguns
- Mount Height: Includes QD absolute co-witness mount (1.41″ dot height); lower 1/3 co-witness spacer available separately
- Magnifier Spacing: Takes up significant rail space when paired with magnifiers; may limit room for backup iron sights
Why We Carry It
The human eye perceives green wavelengths more efficiently than red, making the HE510C-GR’s 540nm green reticle particularly effective in varied environments and beneficial for shooters with certain types of color vision. Since its introduction, this optic has earned recognition as a cost-effective alternative to premium reflex sights, offering comparable durability and features at approximately half the price point. The Elite series designation includes Holosun’s enhanced warranty coverage: a limited lifetime warranty on housing and lens, plus a 10-year warranty on the illumination system. Independent testing has documented this sight maintaining zero through thousands of rounds on platforms ranging from rimfire to full-power rifle cartridges.
Frequently Asked Questions
Will this sight work for shooters with astigmatism?
Results vary by individual. Some shooters with astigmatism report clearer reticle visibility with green dots compared to red, while others find the opposite. The multiple reticle options allow you to select the configuration that appears sharpest to your eye. The 65 MOA circle option can be particularly helpful as it provides a larger aiming reference. Adjusting brightness to lower settings often reduces visual distortion.
How do I mount this sight to my rifle?
The HE510C-GR includes a quick-detach Picatinny mount. First, loosen (but don’t remove) the clamp adjustment screw using the included Torx tool. Position the sight on your rail, close the QD lever, and tighten the adjustment screw to 5-10 inch-pounds (slightly more than finger-tight). Mount the optic on your receiver rather than the handguard for consistent zero retention. The sight comes with absolute co-witness height for use with standard AR-15 iron sights.
What’s the actual battery life, and how does the solar panel work?
Battery life reaches 50,000 hours when using the 2 MOA dot alone; using both the circle and dot reduces this to approximately 20,000 hours. The solar panel on top provides automatic brightness adjustment and can fully power the optic in adequate lighting conditions. If ambient light is insufficient, the sight draws supplemental or full power from the CR2032 battery. The Shake Awake feature further extends battery life by powering down after 10 minutes of no motion.
Spec Sheet
Optical Data
- Reticle: 2 MOA Dot & 65 MOA Circle
- Light Wavelength: 540nm
- Reticle Color: Green
- Parallax Free: Yes
- Unlimited Eye Relief: Yes
- Magnification: 1x
- Multi-Coatings: Yes
Mechanical Data
- Housing Material: Aluminum & Titanium Hood
- Surface Finish: MAO
- Adjustment per Click: 0.5 MOA
- W&E Travel Range: ±50 MOA
Electronic Data
- Power Source: Battery
- Battery Type: CR2032
- Battery Life (Hours): 50000 (dot only)
- Brightness Setting: 10 DL & 2 NV
Environmental Data
- Storage Temperature: -40℃~70℃
- Working Temperature: -30℃~60℃
- Submersion: IP67
Physical Data
- Window Size: 0.91×1.26
- Dimension (in): 3.3×1.68×1.78
- Weight (oz): 4.94
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