Description
Battle-proven titanium enclosed red dot that eliminates emitter obstruction and maintains zero through the harshest conditions.
Whether you’re in law enforcement, competitive shooting, or serious defensive carry, the Holosun HE509T-RD X2 solves a critical vulnerability that plagues traditional open-emitter sights: environmental interference. Rain, snow, debris, and dust can’t reach the LED emitter inside this nitrogen-purged titanium housing, ensuring your reticle stays clear and visible when it matters most. The side-loading battery tray means you’ll never lose your zero during battery changes, while the dual-power system with solar backup provides redundancy that could save your life.
Key Features
- Enclosed Titanium Construction: Grade 5 titanium housing protects the LED emitter from rain, snow, debris, and impacts while adding only 1.72 ounces to your slide
- Three-Reticle Flexibility: Switch instantly between 2 MOA dot for precision, 32 MOA circle for speed, or both combined—no re-zeroing required when changing reticles
- Dual Power System: Solar Failsafe technology automatically switches to solar power in bright conditions, extending battery life up to 50,000 hours on setting 6 with the CR1632 battery
- Shake Awake Technology: Motion sensor powers down the LED after 10 minutes of inactivity and instantly reactivates with the slightest movement, conserving battery during storage while ensuring instant readiness
Important Compatibility Notes
- The included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces.
- For Glock MOS pistols, using an aftermarket direct-mount adapter plate eliminates the “plate sandwich” configuration and improves reliability.
Why We Carry It
The HE509T-RD X2 represents a significant evolution in pistol optic design—addressing the Achilles heel of open-emitter sights. Nitrogen purging prevents internal fogging even during extreme temperature changes, a feature typically found only in premium rifle scopes. Professional users particularly value the side-access battery compartment, which allows battery replacement without removing the optic or disturbing your zero—a feature that becomes critical during extended training sessions or duty use.
Frequently Asked Questions
How does the Lock Mode work, and when should I use it?
Lock Mode prevents accidental button presses by requiring a deliberate long press to unlock the controls. This feature is particularly useful for concealed carry or duty use, where the sight might contact clothing or gear. Activate it by holding both buttons simultaneously for three seconds.
Can I co-witness iron sights with this optic?
The 509T’s enclosed design sits higher than open-emitter sights, typically requiring suppressor-height iron sights to achieve lower 1/3 co-witness. The exact height depends on your mounting solution—direct-milled slides generally sit lower than those using adapter plates. Check with your gunsmith or slide manufacturer for specific sight height recommendations.
How do I change between the different reticle options?
Press and hold the minus (−) button for approximately three seconds. The reticle will cycle through the three options: circle-dot combination, dot only, or circle only. The optic remembers your last setting even after powering off.
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 (Setting 6)
- Brightness Setting: 10 DL & 2 NV Compatible
Physical Data
- Window Size: 0.66×0.9 inches
- Dimension (in): 1.6×1.16×1.13
- Weight (oz): 1.72
Mechanical Data
- Housing Material: Titanium (Grade 5)
- Surface Finish: Titanium
- Adjustment per Click: 1 MOA
- Windage & Elevation Travel Range: ±30 MOA
Environment Data
- Storage Temperature: -40℃ to 70℃
- Working Temperature: -30℃ to 60℃
- Submersion: IP67
- Vibration: 5000G
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