This laser-sighting system can be constructed as a compact side module for use with a revolver or automatic pistol. Features on the side of the firearm such as the yoke screw and the other side plate screws of a revolver are used to secure this laser-sighting system in a favorable location on the side...http://www.google.com/patents/US6591536?utm_source=gb-gplus-sharePatent US6591536 - Method and apparatus for side of frame positioning of laser sights and LED illuminators
