I was surfing the web and found a shotgun sight called Uni-Dot. The principle behind it is a cylinder with a strip of colored fiber optic in front of it. The fiber optic is only visible when the shooter's eye is properly lined up, the gun is properly "mounted" This lead me to wonder if a similar, though smaller, system could be used on a pistol as a front sight only system for defensive shooting. When the dot is visible the pistol is pointing at the object covered by the front sight. If the system on a shotgun can help hit a gamebird at 20-50 yards, it would seem usable at under 25 feet. A similar system has been developed for bows. A standard rear sight could be mounted when precision accuracy was demanded. The company claims that the sighting system for shotguns trains the shooter to mount the gun properly, this may transfer to a shooter bringing the pistol up to the point the eye is looking as a trained action giving faster target aquisition.