Brightest Tritium sights on the market Rugged machined steel sight post serrated for glare reduction Matte black Nitride finish - excellent wear- and corrosion-resistance Front rings available in yellow, orange, white, or black Compatible with the MBUS Pro line of front sights by Magpul The Night Fision adjustable front sight post for MBUS Pro is designed to replace the factory front sight post on Magpul Industries line of MBUS Pro flip up sights. Night Fisions front sight post is made from high-quality steel and features a tritium insert that provides exceptional visibility in low-light.