Tacticon Armament Firefly V1 Pistol and Rifle Laser/Flashlight Combo Green Laser Black. The picatinny rail mount is integrated into the polymer housing of the Firefly V1 and has a hand-tightening knob to adjust tension on the rail. The Firefly V1 Laser Flashlight Combo features a pressure tail switch with double sided tape (included) to mount anywhere desired on your rifle. Battery life is approximately 2 hours 45 minutes run time with laser on and 1 hour 15 minutes with flashlight on. Specifications for Tacticon Armament Firefly V1 Pistol and Rifle Laser/Flashlight Combo: Manufacturer: Tacticon Armament Light Output: 220 lumens Battery Type: CR123A Stand Alone Lithium Color: Black Gun Model: AR-15 Diameter: 1.75 in Length: 3.75 in Weight: 4.6 oz Condition: New Gun Type: Rifle Mount Type: Picatinny Attachment Type: Picatinny Features of Tacticon Armament Firefly V1 Pistol and Rifle Laser/Flashlight Combo Mounts to any standard 20mm picatinny rail. Tail on/off switch. Package Contents: Tacticon Armament Firefly V1 Pistol and Rifle Laser/Flashlight Combo Tacticon Armament FGL10: Firefly V1 Pistol and Rifle Laser/Flashlight Combo Green Laser Black