The Ncstar VAPFLSRV3 Pistol Flashlight with Strobe and Red Laser has a weaver/picatinny style mount. Red Laser Combo features Electronic Control Buttons and they are completely Ambidextrous, there are four button on each side of the pistol flashlight and laser body. There is a Flashlight Momentary button on top, Flashlight Constant On/Off button on the bottom, the Middle button turns the Laser On/Off, and the Flashlight Strobe button is at the front. Momentary & Constant On/Off buttons are positioned and angled ergonomically. They are accessible from your Trigger Finger or your support hand thumb when gripping the pistol. 3W Ultra Bright 200 Lumen CREE LED flashlight. Slides onto most Weaver / Picatinny / MIL-STD 1913/ Pistol accessory spec rails with room. Fully Adjustable Red Laser: 635-655nm, Max output <5mw, Class IIIa Laser. Dimensions: 3.4L x 1.5W x 1.6H. Black Anodized Aluminum body. Uses 1 each CR123A Battery Included.