Apparatus and method for a firing pin sight system. At least one rearwardly facing sight is located at a rear contact surface of a firing pin of a firearm. The at least one rearwardly facing sight is viewable to a shooter from the rear of the firearm. The at least one rearwardly facing sight forms a high contrast surface (in respect the rear surface of the firearm) allowing the shooter to align the at least one rearwardly facing sight point with a target located in front of said firearm. An optical alignment signaling indicia indicates to the shooter when the aim line of the handgun is either off-sight alignment or on-sight alignment.