US Patent 10180306 Illuminated weapon sight

A sighting system for use with firearms having a barrel for releasing a projectile toward a target, including an LED light, a power source for powering the LED light, a circuit that receives power from the power source and provides it to the LED light and controls the LED light, a housing for encasing the LED light, power source and circuit to act as an independent unit, wherein the housing is designed to be retrofit entirely on top of the barrel of the firearm, so that in dim light a user is guided by light from the LED light to align the barrel toward the target.