The Red Laser Bore Sight Kit provides a versatile solution for precision bore sighting across a wide range of calibers. At the core of the kit is the .223 red laser modular bore sight (MBS223), which supports two power configurations: a compact setup using 3 LR41/AG3 batteries, and an extended runtime option using an external battery pack powered by 2 AAA batteries, capable of over 20 hours of continuous use. Both power options are included for maximum flexibility. The kit also includes two arbors for expanded caliber compatibility: AR243 Arbor: Compatible with all .308-based calibers, including .243, 7mm-08, .260 Remington, .308/7.62x51, .338 Federal, .444 Marlin, 7mm STE, and more. AR3006 Arbor: Designed for use with .30-06, .25-06, .270, .280, .35 Whelen, .300 Savage, and select Mauser calibers. Ideal for hunters, precision shooters, and firearms enthusiasts, this kit streamlines the zeroing process with consistent laser alignment across multiple platforms.