Description Tested and recommended by the National Tactical Officers Association, the Sightmark® Laser Boresight offers a quick and easy way to sight in your 9mm Luger and .45 ACP pistols. Simply chamber the boresight like a regular cartridge, and a bright red laser dot shows exactly where you're aiming for fast, precise alignment. Ideal for hunters, competitive shooters, and law enforcement, this device significantly reduces wasted cartridges and shells—saving your ammo for when it counts. It can also be used as a training aid for “quick draw” drills. Includes a carrying case, three (3) AG3 batteries, and instructions.