US Patent 8695266 Reference beam generating apparatus

The present invention provides an apparatus for aiding in the alignment of a scope of a firearm. The apparatus includes a light generation device and a level indicator. The light generation device is attachable to the firearm and is for generating a reference beam. The reference beam may be a horizontal, vertical, or cross-hair line beam. When the level indicator indicates a level state, the reference beam generated by the light generation device is also level. Typically, the level reference beam is projected against a flat surface and is used as a reference to line up the crosshairs of a scope attached to the firearm.