ArmaLaser GTO/FLX Finger Touch Green Laser Sight for S&W SD9VE/SD40VE 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 S&W pistol with the ArmaLaser GTO/FLX Finger Touch Polymer Green Laser Sight. Specifications for ArmaLaser GTO/FLX Finger Touch Green Laser Sight for S&W Handguns: Manufacturer: ArmaLaser Color: Black Beam Color: Green Laser Output: 4 mW Wavelength: 520 nm Attachment Type: Weaver Picatinny Battery Type: 357 CR1/3N Battery Life: Up to 2.3 hours Battery Quantity: 2 Gun Make: Smith & Wesson Fabric/Material: Zytel FRN Polymer Mount Type: Weaver Features of ArmaLaser GTO/FLX Finger Touch Green Laser Sight for S&W Handguns 4F-LS-ALSWMPCLS: Grip-Touch Activation by using FLX Side-Touch Activation without FLX Ultra-bright 520nm green laser Steady and pulse beam options. Master on/off switch. Windage and elevation adjustable. Picatinny/Weaver rail mounted. Sensor located where trigger guard meets grip. 5 Year Warranty. Package Contents: ArmaLaser GTO/FLX Finger Touch Green Laser Sight for S&W Handguns What firearm models does the manufacturer say ArmaLaser GTO/FLX Finger Touch Green Laser Sight for S&W Handguns is compatible with? The manufacturer suggests that ArmaLaser GTO/FLX Finger Touch Green Laser Sight for S&W Handguns is compatible with Smith & Wesson SD40 VE Smith & Wesson SD9 VE Smith & Wesson M&P 3.5in Smith & Wesson M&P 4.1in Smith & Wesson M&P 4.25in Smith & Wesson M&P 4.5in Smith & Wesson M&P 4in Smith & Wesson M&P 5in Smith & Wesson M&P 22 CompactArmaLaser GTOGFLX03: GTO/FLX Finger Touch Green Laser Sight for S&W SD9VE/SD40VE Black