ArmaLaser GTO/FLX Finger Touch Green Laser Sight for Fn Five-Seven Black. ArmaLaser designed these Green Laser Sights with 2 options for activation: the FLX switch for intuitive instant activation and the switch on the GTO that you can access with your index finger. The master on/off switch on the ArmaLaser GTO/FLX Red Laser Sight lets you turn it off to use BUIS or other optics. Customize your FN handgun with the ArmaLaser GTO/FLX Finger Touch Polymer Green Laser Sight. Specifications for ArmaLaser GTO/FLX Finger Touch Green Laser Sight for FN Handguns: Manufacturer: ArmaLaser Color: Black Beam Color: Green Laser Output: 4 mW Wavelength: 520 nm Maximum Range: 50 ft Attachment Type: Weaver Picatinny Battery Type: 357 CR1/3N Lithium Battery Life: Up to 2.3 hours Battery Quantity: 2 Gun Make: FN Herstal Fabric/Material: Zytel FRN Polymer Condition: New Mount Type: Weaver Features of ArmaLaser GTO/FLX Finger Touch Green Laser Sight for FN Handguns Grip-Touch Activation by using FLX Side-Touch Activation without FLX Ultra-bright Class 3R 520nm Package Contents: ArmaLaser GTO/FLX Finger Touch Green Laser Sight for FN Handguns What firearm models does the manufacturer say ArmaLaser GTO/FLX Finger Touch Green Laser Sight for FN Handguns is compatible with? The manufacturer says that ArmaLaser GTO/FLX Finger Touch Green Laser Sight for FN Handguns is compatible with FN Five-seveN FN FNS FN FNX FN FNP FN FNP-9 FN FNS CompactArmaLaser GTOGFLX29: GTO/FLX Finger Touch Green Laser Sight for Fn Five-Seven Black