Optics Ready Stealth Night Sight Set for Glock 19/17/45/23 w/ Holosun SCSBrightest Tritium sights on the market Rugged machined steel sight bodies serrated for reduction of glare Matte black Nitride finish excellent wear and corrosion resistance Front rings available in yellow, orange, or black Designed for an approximate lower 1 3rd co witness with Holosun SCS Compatible with Glock MOS models 17 19 34 45 47 22 23 40 41 Night Fision night sights offer a revolutionary new design that with brighter, more vivid, aiming dots.