Knowing your target and what is beyond it is one of the most important aspects of shooting. Shed a little light on the darkness with NcSTAR Flashlights & Lasers. All of our Flashlights & Lasers are light weight and pact in design for extraordinary mobility without getting snagged on any obstructions. Whether you're an Officer fighting crime on the streets a Soldier on the front lines or a Home Owner protecting your family you can trust NcSTAR to illuminate the world around you. Specifications: All Aluminum Construction 635-655nm Red Laser Beam <5mw Universal Barrel Mount fits most Rifle Barrels Includes 3 AG13 Lithium type batteries and mounting tool Standard on/off cap switch Dimensions (inches):2.42L x 0.58W Weight:0.70 oz. with batteries