EZshoot US Ship Bore Sight Cal 223 5.56mm Rem Gauge Red Dot Boresighter with 2 Sets of Batteries

Material: Sturdy brass construction Length:1.77" (45mm) Laser Wavelength (nm) :640 to 660 LED Type: visible red laser Power: <5 mW Batteries Model:3 of AG3 Sighting Range: 15 to 100 yards How to use the bore sight? 1.Unscrew the back cap from the bore sight by turning counter clockwise 2.Stand the bore sight on a flat surface with the laser side pointing down 3.Insert batteries (+ side up) 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) 7.Unscrew the back and remove the batteries to turn the unit off Package included 1 X Bore Sight 6 X AG3/LR41 Batteries Package Includes: 1 X 223 REM Laser Bore Sight 6 X LR41/AG3 Battery