The embodiments of the disclosed invention relate to fiber optic weapon sights that use a reflector to direct ambient light to a fiber optic rod, and thus can provide weapon sights that are bright, or at least visible, in a variety of lighting condition. In one instance, the reflector can have a concave shape, such as a spherical or parabolic shape, that can focus ambient light on the fiber optic rod and thereby significantly increase the brightness of the weapon sight. The embodiments of the present invention can accordingly provide enhanced fiber optic front and/or rear sights for weapons including rifles, pistols, and shotguns.