The Tiger Rock Inc. LBS303 303 Cartridge Laser Bore Sighter (RED) is engineered for precision sight adjustments, enhancing your shooting accuracy. Constructed from premium aluminum, this durable bore sighter fits seamlessly into .303 chambers, providing consistent visibility with its red laser, ideal for aligning optics in various conditions. Fits .303 Chambers Metallic red finish High quality aluminum casing LED Type: Visible red laser Laser wavelength: 635-655 nm Laser beam: < 5mW Sighting range: 20-30 yards Dot size: 1.5" @ 100 yards Requires (3) LR41 button cell batteries Enhance your aiming precision and improve your shooting performance with the Tiger Rock Inc. LBS303.