Description
The HE509T-GR X2 combines enclosed emitter protection with green dot visibility in a titanium housing—built for handgun duty use where reliability matters most.
When your pistol sight needs to work every time without debris interference or battery concerns, the Holosun HE509T-GR X2 delivers enclosed LED protection with solar backup and three reticle options. The nitrogen-purged titanium housing prevents internal fogging while the 540nm green wavelength provides enhanced visibility across varying light conditions—from bright outdoor ranges to low-light scenarios. Side-loading battery access means you can swap the CR1632 without losing your zero, while Shake Awake technology ensures instant activation when you need it.
Key Features
- Enclosed Titanium Construction: Grade 5 titanium housing with nitrogen purging prevents debris, water, and dust from obstructing the emitter while maintaining a lightweight profile at just 1.72 ounces.
- 540nm Green Super LED: Designed to match the wavelength the human eye perceives most readily, providing superior visibility in bright conditions with up to 50,000 hours of battery life on setting 6.
- Multi-Reticle System with Lock Mode: Switch between 2 MOA dot only, 32 MOA circle only, or circle-dot combination; Lock Mode prevents inadvertent setting changes during use.
- Dual Power with Solar Failsafe: Battery and solar power operation ensures the optic remains functional even if the CR1632 battery depletes when ambient light is available.
Important Compatibility Notes
- The included RMR adapter plate works with standard RMR-pattern cuts but is NOT compatible with alternative RMR footprints that use threaded bosses, including:
- Zev Technologies slides with threaded posts
- Brownells slides with threaded posts
- Shadow Systems style RMR interfaces with threaded bosses
Why We Carry It
The HE509T-GR X2 represents Holosun’s enclosed emitter technology matured to its X2 generation with improved glass clarity over the original 509T. Grade 5 titanium offers more than double the tensile strength and five times the fatigue strength of 7075 aluminum commonly used in competing optics. The enclosed design addresses a practical concern for duty and defensive handguns—keeping the emitter protected from environmental elements that can compromise open-emitter designs. Law enforcement agencies have approved this sight for duty use, reflecting confidence in its reliability under demanding conditions.
Frequently Asked Questions
Will the green dot help with my astigmatism compared to red dots?
Many shooters with astigmatism report better clarity with green dots, though individual results vary. The 540nm green wavelength may appear crisper than red for some users. The enclosed design and quality glass coatings also contribute to a cleaner sight picture. Consider testing the optic if possible, as astigmatism affects each person differently.
How does Shake Awake technology work, and can I disable it?
Shake Awake detects motion and instantly activates the LED when you handle your firearm, then deactivates after a period of inactivity (configurable from 10 minutes to 12 hours). This extends battery life significantly during storage while ensuring the optic is always ready when you draw your pistol. You can disable Shake Awake if you prefer the optic to remain continuously on.
Can I change the battery without removing the optic from my slide?
Yes. The side-loading battery tray allows you to replace the CR1632 battery without dismounting the sight, preserving your zero. This design feature distinguishes the 509T series from top-loading battery compartments that require removal for battery changes.
Spec Sheet
Optical Data
- Reticle: 2 MOA Dot & 32 MOA Circle
- Light Wavelength: 540nm
- Reticle Color: Green
- Parallax Free: Yes
- Unlimited Eye Relief: Yes
- Magnification: 1x
- Multi-Coatings: Yes
Electronic Data
- Power Source: Solar & Battery
- Battery Type: CR1632
- Battery Life (Hours): 50,000 (Setting 6)
- Brightness Settings: 12 (10 DL & 2 NV Compatible)
Mechanical Data
- Housing Material: Titanium (Grade 5)
- Surface Finish: Titanium
- Adjustment per Click: 1 MOA
- W&E Travel Range: ±30 MOA
- Window Size: 0.66 × 0.9 inches
Physical Data
- Dimensions: 1.6 × 1.16 × 1.13 inches
- Weight: 1.72 ounces
Environment Data
- Storage Temperature: -40℃ to 70℃
- Working Temperature: -30℃ to 60℃
- Submersion: IP67 rated
- Vibration: 5000G
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