The BSA bore sighter is a time and money saving tool that simplifies the process of pre-zeroing your scope without the need for ammunition. This comprehensive kit includes a range of popular Cals, making it suitable for most rifles and handguns. By using the Bore Sighter, you can quickly and accurately pre-zero your scope before heading to the range for final adjustments. Say goodbye to wasted rounds and hello to precision shooting with the BSA bore sighter.