Specification:
Color: Gold Battery type: LR41（Batteries included ）
Package included:
-- 1 X Laser
-- 9 X LR41 Batteries
--9 X spare O-rings
Here are the steps to use the Laser Bore Sight End Barrel:
1.Twist the back cap off the bore sight in a counterclockwise direction.
2.Place the bore sight on a flat surface with the laser side facing downward.
Insert batteries with the positive side up into the rear opening.
4.Gently press down and twist the screw cap clockwise to secure it (the laser is now on).
5.Place it from the caliber (without silencer)
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