Description
This enclosed titanium reflex sight combines duty-grade durability with advanced green dot optics and solar backup technology for serious handgun applications.
The HE509T-GR X2 delivers reliable aiming performance in the harshest conditions through its fully enclosed design that keeps debris, water, and dust away from the emitter. This FDE (Flat Dark Earth) variant features a desert tan finish that complements earth-toned pistol builds while providing a non-reflective tactical surface. The green Super LED provides enhanced visibility in bright outdoor conditions and works with astigmatism better than traditional red dots, while the solar failsafe ensures your sight stays operational even if the battery depletes. With shake awake technology and side-loading battery access, you spend more time shooting and less time managing your optic.
Key Features
- Enclosed Titanium Construction: Grade 5 titanium housing provides superior strength with reduced weight compared to aluminum, protecting the emitter from environmental elements while maintaining a lightweight 1.72-ounce profile—finished in durable Flat Dark Earth coating.
- Multi-Reticle System With Green LED: Choose between a 2 MOA dot for precision, a 32 MOA circle for rapid acquisition, or a combined circle-dot reticle, all powered by 540nm green wavelength optimized for human eye sensitivity.
- Solar Failsafe with 50,000-Hour Battery Life: Dual power system combines CR1632 battery lasting up to 50,000 hours on mid-settings with solar backup that keeps the sight running when natural or artificial light is available.
Important Compatibility Notes
The included RMR adapter plate works with standard RMR footprint cuts but has specific limitations:
- NOT compatible with Zev Technologies slides featuring threaded boss posts (Zev OZ9, Zev Glock slides with 4-40 threaded posts)
- NOT compatible with Brownells Glock slides featuring threaded boss posts
- NOT compatible with Shadow Systems RMR-style interfaces with threaded bosses
- Some Glock MOS configurations may require screw length modification when using both the factory MOS plate and the included 509T adapter
- The 509T uses its own unique footprint and does NOT mount directly to Picatinny rails without an adapter
Why We Carry It
The 509T represents a significant evolution in pistol red dot technology by fully enclosing the LED emitter—a design approach that protects the most critical component from environmental hazards that can disable open-emitter sights. Grade 5 titanium offers more than double the tensile strength and five times the fatigue strength of 7075 aluminum while resisting saltwater corrosion, making this green-dot sight suitable for maritime and extreme-duty environments. The FDE finish provides additional versatility for shooters looking to match their optic to FDE-framed pistols or desert/earth-toned builds. The green 540nm wavelength matches the peak sensitivity of human vision, providing approximately 30% better visibility than red dots in daylight conditions and reducing the starburst effect for shooters with astigmatism. Independent testing by professionals has validated the 509T’s durability and zero retention under sustained use.
Frequently Asked Questions
How does the green dot compare to a red dot for someone with astigmatism?
The green 540nm wavelength typically produces less starburst distortion than red dots for shooters with astigmatism because the human eye processes green light more efficiently. Many users with moderate astigmatism report clearer, crisper dot definition with green compared to red, though individual results vary. The 509T’s enclosed design also contributes to reticle clarity by protecting the emitter window from smudges and debris.
Can I change the battery without removing the sight from my pistol?
Yes. The HE509T-GR X2 features a side-loading battery tray secured with a flathead screw, allowing battery replacement while the optic remains mounted. The CR1632 battery is rated for 50,000 hours on mid-brightness settings, which translates to approximately 5-6 years of continuous operation, though annual battery replacement is recommended for duty use.
Will this work with my existing RMR-milled slide or holster?
The 509T uses its own unique crossbolt footprint and requires the included RMR adapter plate to mount on RMR-cut slides. The adapter works with standard RMR cuts but NOT with Zev or Brownells slides featuring threaded boss posts. For holster compatibility, the 509T has proven compatible with most RMR-compatible holsters, including Safariland models, though the slightly larger enclosed housing may require verification for tight-fitting appendix carry holsters.
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
- Window Size: 0.66×0.9
ELECTRONIC DATA
- Power Source: Solar & Battery
- Battery Type: CR1632
- Battery Life (Hours): 50000
- Brightness Setting: 10 DL & 2 NV
MECHANICAL DATA
- Housing Material: Titanium
- Surface Finish: Flat Dark Earth (FDE)
- Adjustment per Click: 1 MOA
- W&E Travel Range: ±30 MOA
- Dimension (in): 1.6×1.16×1.13
- Weight (oz): 1.72
ENVIRONMENT DATA
- Storage Temperature: -40℃~70℃
- Working Temperature: -30℃~60℃
- Submersion: IP67
- Vibration: 5000G
IN THE BOX
- RMR Adapter
- T10 L Key
- User Manual
- CR1632 Battery
- Lens Cloth
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