Abstract: A laser sighting apparatus for firearms having a laser module disposed in a cartridge-shaped housing with the same bore as the firearm. The laser module is adjustable so as to consistently produce a red dot on a target from a laser beam running through the bore of the firearm. The crosshairs of a conventional scope mounted on the firearm can be aligned with the red dot, and the laser module and housing removed from the firearm. A live round of ammunition, when discharged from the firearm, will now strike a target exactly at the point defined by the intersection of the crosshairs of the firearm's scope. A safety spring is provided which prevents destruction of the aperture if the firearm is accidently discharged with the laser module and housing still in the bore of the firearm.