The primary function of a bore sighter is to provide a quick and convenient way to zero a firearm before heading to the range or engaging in shooting activities. It eliminates the need for live ammunition during the zeroing process, making it both safe and cost-effective. By using a bore sighter, shooters can save time and ammunition by getting their initial adjustments done efficiently.

Please note that the power of green laser is higher than that of red laser
Red laser contains 6 batteries
Green laser contains 12 batteries