100% brand new and high quality，Easy-to-use.Works with scopes， holographic red dot sights， and variety sights.Easy and convenient to use with the accuracy of any bore sighting system.Durable， machined brass housing looks like a cartridge caseSimply place batteries in end cap-twist and end cap to turn on-and place in chamber Specifications:1.Power: <5mW2.Wavelength: 650nM 3.Weight (net): 11g (0.4 ounces) 4.Length: 44.5mm (1.8 inch) 5.High quality brass in durable finish6.Already set center aligning in factoryPackage Includes:1x 223 556 REM Laser Bore Sight4x AG3 Battery