Aobi&reg; New Bore Sighter 7.62x39mm Cartridge Red Dot Laser Sight Boresighter Hunting Material: High Quality Brass Laser output less than &lt;5mw. Wavelength 635-655NW. Lengh: 38mm sight in your scopes & sights without firing and ammo Easy and convenient to use with the Best Accuracy of any bore sighting system Solid metal construction