Tested and recommended by the National Tactical Officers Association, the SightmarkA(R).223 Boresight significantly reduces wasted cartridges and shells. Chamber the device in your .223 rifle like a regular cartridge, and a red laser dot shows exactly where you're aiming. Simply adjust your sights or scope, and save your extra ammo for the hunt. Includes a carrying case, three (3) AG3 batteries, and instructions. Features: Precision accuracy Reliable and durable Fastest gun zeroing and sighting system Reduce wasted cartridges and shells Compact and lightweight Easy to pack and travel For the best selection of parts and accessories for your Modern Sporting rifle at the best prices, shop Palmetto State Armory!