The Holosun 407C Green Dot (X2) is an open-emitter pistol reflex sight built around a 2 MOA green dot reticle and a direct RMR-footprint mounting pattern. It combines a side-tray battery with a solar backup system and motion-activated wake/sleep behavior to support low-maintenance use on full-size and compact handgun slides.
 
Key Features
2 MOA green dot reticle: A fine aiming point intended for precise shot placement and consistent zeroing at typical handgun distances.
Solar Failsafe system: Uses a solar cell to help maintain operation in suitable lighting conditions and provide a backup power source when needed.
Shake Awake function: Motion sensing turns the reticle on with movement and powers down after inactivity to help conserve battery life.
Lock Mode controls: Button lockout helps prevent inadvertent brightness or setting changes during carry or handling.
Side-tray battery compartment: CR1632 battery access from the side reduces the need to remove the optic for battery replacement.
 
Generational Improvements
X2 update feature set: Adds Lock Mode to help prevent unintended setting changes compared with earlier versions of the 407C line.
 
Specifications
Model number: HE407C-GR X2
Optic type: Open-emitter reflex sight for pistol slide mounting.
Mounting footprint: Trijicon RMR pattern.
Magnification: 1×.
Reticle: 2 MOA dot.
Reticle color: Green.
Brightness settings: 12 total with 10 daylight settings and 2 night-vision compatible settings.
Power source: CR1632 battery with solar assist/backup.
Advertised battery life: Up to 50,000 hours (at a mid-level brightness setting).
Window size: 0.63 × 0.91 in.
Overall dimensions: 1.78 × 1.15 × 1.15 in.
Weight: 1.5 oz.
Housing material: 7075-T6 aluminum.
Finish: Anodized.
Adjustment value: 1 MOA per click.
Adjustment range: ±50 MOA windage and elevation.
Parallax/eye relief: Parallax-free design with unlimited eye relief.
Water resistance: IP67 submersible rating.
Operating temperature: -30°C to 60°C.
Storage temperature: -40°C to 70°C.
Vibration rating: 5000G.
Included items: T10 L key, CR1632 battery, user manual, lens cloth.
 
Competing Items
Trijicon RMR Type 2: Durable open-emitter pistol optic commonly used on duty and carry handguns.
Trijicon SRO: Larger-window open-emitter optic aimed at faster dot acquisition on pistols.
Leupold DeltaPoint Pro: Larger-window pistol optic often used for duty and competition setups.
Aimpoint ACRO P-2: Enclosed-emitter pistol optic designed for environmental protection and duty use.
Vortex Viper: Open-emitter pistol optic option in a similar use category for slide-mounted handguns.
 
The Holosun 407C Green Dot (X2) is a compact RMR-footprint pistol optic that pairs a 2 MOA green dot with solar backup, motion-activated operation, and a side-access battery tray. It is best suited to users who want a straightforward dot-only reticle and a low-maintenance power system for carry, duty, or range use.