Ncstar's red laser sight with universal barrel mount features a tri-rail universal barrel mount which is compatible with most standard rifle barrel diameters.Constructed of aluminum and plastic the laser has a 635-655nm wavelength with a 5mw output and a side to side toggle on/off switch.It uses and includes two ag13 batteries and mounting tools.

Power Switch: On/Off
Wavelength: 635-655 nm
Power: 5mW
Weight: 2.80 oz
Battery: AG13
Laser Color: Red
Firearm Fit: Fits Most Standard Rifle Barrels
Finish: Black
Mount Type: Tri-Rail Barrel Mount