Specification:Type: Laser Bore SightConstruction: BrassOutput Power: 1mWLaser Type: Red LaserLaser Class: IIIALaser Wavelength: 640 to 660nmRange for Sighting: 15 to 100 ydsDot Size: 2 in @100ydsBattery Type: 6 x L736F Batteries (Included)Battery Life: 90 mins per setOperation: on/off end capOperating Temp: -10℃ to 40℃Applicable Caliber: Cal.223 Rem / 5.56mm /9mm chamberFeatures:
5.【STRURDY DURABLE】The laser bore sight is made of sturdy and durable brass construction, light and compact size, sit perfectly in the bore, it adapt to various bad environments.How to use the bore sight?1.Unscrew the back cap from the bore sight by turning counterclockwise.2.Stand the bore sight on a flat surface with the laser side pointing down.3.Insert batteries inside the rear opening.4.Carefully push down and turn the screw cap clockwise to tighten the cap (the laser is now on).5.Place in your rifle’s chamber and close the bolt.6.To remove - open the bolt if it does not automatically extract, manually remove the unit by tilting the rifle’s barrel upward (always practicing safe firearm practices).