Featuring highly efficient light-absorbing colored fiber optic plastic and glass rods housed in ultra-strong black nitride coated steel, the TRYBE Defense High Glow Fiber Optic Night Sights offer reliable brightness and pinpoint accuracy, any time you need it. Not only do these night sights boast some of the brightest and longest lasting fiber optic rods on the market, but their reflective outer sheaths also absorb and trap light to naturally draw your eye to the target in focus.