A great accessory for any tactical rifle, the Barska Tactical Red Laser Rifle Sight produces a bright, red dot on your target, giving you increased accuracy and precision. Features a tube diameter of 19mm, a reach capacity of 500 yards, and is powered by three LR-44 Lithium Batteries. Equipped with an on/off button for easy operation. Constructed with tough, lightweight aluminum. Includes three LR-44 Lithium Batteries, flashlight, and mount.