The Holosun HE509T-RD-X2 is an enclosed-emitter red dot sight built for duty-grade performance in harsh environments. Designed for handgun applications, the optic features Holosun’s Multiple Reticle System (MRS), allowing the user to switch between a 2 MOA dot, a 32 MOA circle, or a combined circle-dot configuration. The fully enclosed housing prevents environmental debris from interfering with the emitter, increasing reliability in adverse conditions.

Housed in black hardcoat anodized titanium, the 509T is impact-resistant and waterproof to IP67 standards. A side-loading CR1632 battery provides up to 50,000 hours of runtime on medium settings, while Solar Failsafe keeps the sight powered in changing lighting conditions. Shake Awake enables motion-based activation and conserves battery life during inactivity. 

• Reticle: 2 MOA dot, 32 MOA circle, or circle-dot (red)

• Brightness Settings: 12 total (10 daylight, 2 night vision)

• Power Source: CR1632 battery (side-loading) + Solar Failsafe

• Battery Life: Up to 50,000 hours (dot only, setting 6)

• Power Features: Shake Awake, Solar Failsafe

• Emitter Type: Enclosed

• Housing Material: Titanium

• Lens: Multicoated glass

• Mounting Footprint: 509T proprietary

• Water Resistance: IP67

• Window Size: 0.66" × 0.9"

• Weight: 1.72 oz