Meprolight USA Tru-Dot Green Tritium Green Tritium/Black Frame, S&W M&P Shield/Shield Plus/Shield 2.0 117703101

Meprolight sights take maximum advantage of tritium light sources the fail-safe, maintenance-free light sources that don't require any external source of energy and provides up to 15 years of usable light under all weather conditions. Meprolight continues to offer the strongest guarantee in the industry for the usable light of their Tru-Dot sights.