Chamber the Sightmark .22-.250 Boresight in your .22-.250 rifle like a regular cartridge, and a red laser dot shows exactly where you&';re aiming. Ideal for hunters, competitive shooters, and law enforcement, this device significantly reduces wasted cartridges and shells. Simply adjust your sights or scope, and save your extra ammo for the hunt. It includes a carrying case, three AG3 batteries, and instructions. Less than 1Mw 632-650nm class II red laser Compatible with both 6.5 Creedmoor and .22-.250 barrels Precision accuracy due to compact and lightweight size Fastest gun zeroing and sighting system that is reliable and durable Reduce wasted cartridges and shells