SightMark Laser Bore Sights Cartridge Sizes: SightMark Laser Bore Sight - 223 Model SM39001 Compact 0.223 Boresight designed for fast gun zeroing and sighting 15 to 100 yard sighting range 632 to 650 nm laser wavelength Sturdy brass construction Comes with carry pouch Class IIIA laser; 5mW or less