Description
This enclosed titanium red dot delivers unmatched durability and versatility with solar backup, keeping you ready in any environment.
Your pistol optic shouldn’t fail when conditions get tough. The Holosun HE509T-RD X2 solves the critical vulnerability of open-emitter sights by fully enclosing the LED within a grade 5 titanium housing, protecting your sight picture from rain, snow, dust, and debris. This FDE (Flat Dark Earth) variant offers a desert tan finish that complements earth-toned pistol builds and provides a non-reflective surface for tactical applications. The multi-reticle system lets you instantly switch between precision shots and rapid target acquisition, while solar backup ensures you’ll never lose your aiming point even with a dead battery. With up to 50,000 hours of battery life and side-loading battery access, this sight keeps you operational without removing the optic from your slide.
Key Features
- Fully Enclosed Titanium Construction: Grade 5 titanium housing provides twice the tensile strength of 7075 aluminum and resists corrosion from saltwater environments—finished in durable Flat Dark Earth coating.
- Adaptive Multi-Reticle System: Instantly switch between 2 MOA dot, 32 MOA circle, or circle-dot combination without re-zeroing
- Dual Power Supply: Solar Failsafe provides backup power in ambient light conditions, extending operational readiness beyond battery life alone
- Side-Loading Battery Tray: Change the CR1632 battery without removing the optic or losing zero, maintaining over 5 years of continuous use on setting 6
Important Compatibility Notes
While the HE509T-RD X2 includes an RMR adapter plate for standard RMR footprints, please note:
- The included RMR adapter plate is NOT compatible with ZEV or Shadow Systems style RMR interfaces that use threaded bosses
- Direct-mount adapter plates are available separately from aftermarket manufacturers like CHPWS for various pistol models
- When using “plate sandwich” mounting (adapter plate to another plate), verify screw length compatibility
Why We Carry It
The HE509T represents a significant evolution in pistol optic design. Unlike open-emitter sights where even a small obstruction can block your reticle, the 509T’s enclosed design keeps the LED protected between two panes of glass. This makes it exceptionally suited for duty use, maritime environments, and adverse weather shooting. The FDE finish provides additional versatility for shooters looking to match their optic to FDE-framed pistols or desert/earth-toned builds. Professional shooters and law enforcement agencies have adopted this optic for its proven ability to maintain zero through thousands of rounds and maintain functionality after drop tests from shoulder height.
Frequently Asked Questions
How does the Lock Mode work and when should I use it?
Lock Mode prevents accidental button presses during carry or storage by locking out the brightness controls until you perform a deliberate long press to unlock them. This feature is particularly useful for duty or concealed carry applications where the optic might contact clothing or equipment. You can enable or disable Lock Mode through the button interface without tools.
Can I use this optic in extremely cold or hot environments?
Yes. The HE509T-RD X2 operates reliably in temperatures from -30°C to 60°C (-22°F to 140°F), with a storage range of -40°C to 70°C. The nitrogen purging prevents internal fogging, and the titanium housing maintains structural integrity across this temperature range.
How does Shake Awake affect real-world battery life?
Shake Awake automatically powers down the optic after a period of inactivity and instantly reactivates with the slightest motion. Combined with the solar panel in Auto Mode, this can extend battery life significantly beyond the stated 50,000 hours. In practical terms, you can expect multiple years of use without battery replacement during normal carry and range use.
Spec Sheet
Optical Data
- Reticle: 2 MOA Dot & 32 MOA Circle
- Light Wavelength: 650nm
- Reticle Color: Red
- 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
- 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
Physical Data
- Window Size: 0.66 × 0.9 in
- 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 Plate
- T10 L Key
- User Manual
- CR1632 Battery
- Lens Cloth
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