This laser gun bore sighting system provides an easy to use system for multiple calibers. The kit includes 8 casings, power supply, laser emitter, bore sighting posts, balance, o-rings, and a reflective target. These casings are for the following calibers: .264, .25-06 Rem, 7mm STW, 7mm Weatherby Mag., 7mm Rem. Ultra, .243, .22-250 Rem, and .270 Win Short Magnum. They can also cover .300 Rem, .338 Rem, .375 Rem, 8mm Rem. Mag., .308 Norma mag., .338 Win Mag., .458 Win. Mag., .280 Win., 30-06 Springfield, .308 Win., and 35 Whelen. This cool kit comes in a hard plastic case.