The handgun according to claim 5, wherein the light source is a laser system, the laser system including a laser emitting device emitting light at the target.
The handgun according to claim 4, further comprising a light source for projecting a beam of light on a target, the light source being attached to the outer frame, the light source being activated by contacting a switch, the switch being positioned on the outer frame such that the front grip contacts the switch when the front grip is in the second position
http://www.google.com/patents/US7506467
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