Product Description

Holosun 509T X2 Enclosed Red Dot Sight

Name: Holosun 509T X2
Brand: Holosun
Availability: InStock

The Holosun 509T X2 is one of the toughest enclosed-emitter pistol optics on the market. Built around a Grade 5 titanium housing, the 509T X2 was designed for duty, defensive carry, and hard-use competition where reliability matters most. Its fully enclosed design protects the emitter from dirt, lint, mud, rain, and other debris that can disable traditional open-emitter optics.

With features like Holosun's Multi-Reticle System (MRS), Shake Awake, Solar Failsafe, and a side-loading battery tray, the 509T X2 offers premium performance without sacrificing durability.

Features

Fully enclosed emitter design
Grade 5 titanium housing
Multi-Reticle System (MRS)
2 MOA Dot
32 MOA Circle
Circle-Dot Combination
Side-loading CR1632 battery
Up to 50,000-hour battery life
Solar Failsafe
Shake Awake Technology
Lock Mode
Improved glass clarity
Night vision compatible
Nitrogen-purged construction
Includes RMR adapter plate

Specifications

Magnification: 1x
Reticle Options:
- 2 MOA Dot
- 32 MOA Circle
- Circle-Dot Combination
Battery: CR1632
Battery Life: Up to 50,000 hours
Brightness Settings:
- 10 Daylight
- 2 Night Vision
Housing: Grade 5 Titanium
Construction: Nitrogen Purged

Built for Hard Use

The 509T X2 was engineered to thrive in environments where traditional open-emitter optics can struggle.

Its fully enclosed housing seals the emitter behind protective glass, preventing mud, dust, rain, lint, or snow from blocking the LED. Whether carried daily, used for duty, or shot in harsh weather, the enclosed design ensures your dot remains visible when you need it most.

The rugged Grade 5 titanium body provides exceptional impact resistance while keeping weight to a minimum.

X2 Improvements

The X2 generation introduced several meaningful upgrades over the original 509T, including:

Improved optical clarity
New Lock Mode to prevent accidental button presses
Updated software for easier operation
Enhanced Multi-Reticle functionality
Solar power support even with a depleted or missing battery

These refinements make the 509T X2 easier to use while maintaining the reliability that made the original so popular.

Multi-Reticle System

Holosun's Multi-Reticle System allows you to quickly select the reticle that best matches your shooting style.

Choose between:

2 MOA Dot for maximum precision
32 MOA Circle for rapid target acquisition
Circle-Dot Combination for the best of both worlds

Switching between reticles requires no loss of zero.

Side-Loading Battery

Unlike many pistol optics that require removal from the slide to replace the battery, the 509T X2 features a side-loading CR1632 battery tray.

Battery changes can be completed in seconds without removing the optic or disturbing your zero.

Mount Compatibility

The 509T X2 ships with an RMR adapter plate, allowing installation on many RMR-compatible mounting systems.

Note: The included adapter plate is not compatible with ZEV or Shadow Systems RMR interfaces.

For the strongest and lowest mounting solution, we recommend a dedicated 509T optic cut whenever possible.

Our Thoughts

The 509T X2 remains one of our favorite enclosed pistol optics.

Before enclosed emitters became commonplace, the 509T proved you could have duty-grade durability without sacrificing usability. The titanium housing inspires confidence, the side-loading battery is extremely convenient, and the enclosed design eliminates one of the biggest weaknesses of open-emitter optics.

While newer optics like the Holosun EPS and Trijicon RCR have entered the market, the 509T X2 continues to be one of the best values in the enclosed-emitter category. If you're looking for an optic that's equally at home on a carry gun, duty pistol, or competition setup, the 509T X2 is an outstanding choice.