The .223/5.56 laser bore sight module is designed to make it quick and easy to bore sight your rifle chambered in .223. This laser is also the basis for the AimShot laser bore sight system and is used in conjunction with the AimShot arbors to bore sight other rifle calibers. It can be used with standard (L41) or external battery box with 2 AAA batteries. The maximum sighting range is 100 yards.