ArmaLaser GTO/FLX Finger Touch Green Laser Sight for Ruger 22/45 Threaded Barrel 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 Ruger with the ArmaLaser GTO/FLX Finger Touch Polymer Green Laser Sight. Specifications for ArmaLaser GTO/FLX Finger Touch Green Laser Sight for Ruger 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: Ruger Fabric/Material: Zytel FRN Polymer Condition: New Mount Type: Weaver Features of ArmaLaser GTO/FLX Finger Touch Green Laser Sight for Ruger 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 Ruger Handguns What firearm models does the manufacturer say ArmaLaser GTO/FLX Finger Touch Green Laser Sight for Ruger Handguns is compatible with? The manufacturer says that ArmaLaser GTO/FLX Finger Touch Green Laser Sight for Ruger Handguns is compatible with Ruger SR9c Ruger SR40c Ruger SR40 Ruger SR9 Ruger SR45 Ruger P95 w/ Rail Ruger SR22 Ruger P345 Ruger 22/45 Ruger American RifleArmaLaser GTOGFLX56: GTO/FLX Finger Touch Green Laser Sight for Ruger 22/45 Threaded Barrel Black