Pinty Laser Red Dot for Scopes 223 REM Bore Sight Cartridge Sight 5.56 NATO Made of premium aluminum, solid construction, superior quality .223 REM / 5.56 BORE SIGHT, made to fit the .223 / 5.56 chamber, caliber specific. High accuracy, laser display 1.5 dot at 100 yards Designed for fast gun zeroing and sighting range 15 to 100 yards Enhances precision and accuracy, save ammunition and money Minimum Range for Sighting: 15 yards Maximum Range for Sighting: 100 yards Wavelength: 645nm, 632nm (.223 20X) Battery Life: approx. 20 min Laser Type: Visible Red Laser Dot Size: 1.5 @ 100 yards. Battery: 3x LR41 (included) Construction: Aluminum