Holosun 509T X2 Red Dot MRS enclosed reflex sight with solar panel and RMR adapter, FDE (SKU: HE509T-X2-RD-FDE / 48866) is a compact pistol sight with an enclosed emitter and a titanium housing. Its construction protects the light source and internal optical components from contamination. The 1× magnification, unlimited eye relief and lenses with multilayer coatings allow comfortable viewing with both eyes open.

The MRS (Multi-Reticle System) offers a choice of a red 2 MOA dot, a 32 MOA circle or their combination. The sight provides automatic brightness adjustment and a manual mode with 12 illumination levels: 10 daylight settings and 2 compatible with night vision devices. Lock Mode locks the buttons to prevent accidental setting changes.

Power is supplied by a CR1632 battery in a side tray, allowing replacement without removing the sight from the firearm. Solar Failsafe uses energy from the solar panel under suitable lighting conditions and provides a backup power source. Shake Awake turns off the reticle after a period without movement and restores illumination when motion is detected, retaining the last brightness setting. The stated battery life is up to 50,000 hours with the dot-only reticle at brightness setting 6.

The housing in FDE (Flat Dark Earth) meets the IP67 protection rating against dust and water. The sight uses the proprietary Holosun 509T mounting footprint. The included RMR-to-509T adapter plate allows installation on a compatible RMR mounting interface.

Key features

• enclosed construction protecting the emitter and internal optical system from contamination
• titanium housing in FDE with an IP67 protection rating
• red reticle with a choice of a 2 MOA dot, a 32 MOA circle or their combination
• automatic brightness adjustment and manual mode with 12 illumination levels
• solar backup through Solar Failsafe and an integrated solar panel
• automatic illumination sleep and wake functions through Shake Awake
• button lock through Lock Mode and last brightness setting memory
• side battery tray allowing battery replacement without removing the sight
• included RMR-to-509T adapter plate

Set contents

• reflex sight: Holosun 509T X2 Red Dot MRS FDE
• adapter plate: RMR to 509T
• mounting screws
• battery: CR1632
• multi-tool
• lens cleaning cloth
• user manual
• warranty card

Technical specifications

• manufacturer: Holosun
• model: 509T X2 Red Dot MRS FDE
• product code: HE509T-X2-RD-FDE / 48866
• barcode: 810047073109
• construction: enclosed reflex sight
• magnification: 1×
• reticle color: red
• illumination source: LED, 650 nm wavelength
• available reticles: 2 MOA dot, 32 MOA circle, circle-dot combination
• optical window dimensions: approximately 23 × 17 mm (0.9 × 0.66")
• optical coatings: multilayer
• eye relief: unlimited
• brightness adjustment: automatic and manual
• brightness levels in manual mode: 12 – 10 daylight and 2 night vision settings
• button lock: Lock Mode
• last brightness setting memory: yes
• power-saving system: Shake Awake
• battery power supply: CR1632 lithium battery, 3 V
• additional power source: solar panel, Solar Failsafe system
• battery location: slide-out side tray
• battery life: up to 50,000 h with the dot-only reticle at brightness setting 6
• adjustment per click: 1 MOA
• elevation adjustment range: ±30 MOA
• windage adjustment range: ±30 MOA
• sight mounting footprint: Holosun 509T
• included adapter: RMR to 509T
• housing material: titanium
• housing color: FDE (Flat Dark Earth)
• protection rating: IP67
• stated shock and vibration resistance: 5000 G
• operating temperature: −30 to +60 °C
• storage temperature: −40 to +70 °C
• dimensions (length × width × height): approximately 41 × 29 × 29 mm
• weight: approximately 49 g