<b>Material:</b> Sturdy brass construction<br> <b>Length:</b>1.77" (45mm)<br> <b>Laser Wavelength (nm) :</b>640 to 660<br> <b>LED Type: </b>visible red laser<br> <b>Power: </b><5 mW <br> <b>Batteries Model:</b>3 of AG3<br> <b>Sighting Range: </b>15 to 100 yards<br> <b>How to use the bore sight?</b> <br> 1.Unscrew the back cap from the bore sight by turning counter clockwise<br> 2.Stand the bore sight on a flat surface with the laser side pointing down<br> 3.Insert batteries (+ side up) inside the rear opening<br> 4.Carefully push down and turn the screw cap clockwise to tighten the cap (the laser is now on)<br> 5.Place in your rifle’s chamber and close the bolt<br> 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)<br> 7.Unscrew the back and remove the batteries to turn the unit off<br> Package included 1 X Bore Sight 6 X AG3/LR41 Batteries<br><br> <b>Package Includes:</b> <br> 1 X 223 REM Laser Bore Sight<br> 6 X LR41/AG3 Battery<br>