The Meprolight Tru-Dot Green Tritium Fixed Night Sight Set is a direct drop-in replacement for the factory sights on Smith & Wesson M&P C.O.R.E. and optics-ready models, featuring self-illuminating Swiss tritium front and rear sights with white contrast rings machined to suppressor height for seamless co-witnessing with mounted optics. Day and night, the shooter's aiming reference is three consistent white-outlined green dots that are identical in appearance and position under all lighting conditions, requiring no transition from day to night use. Maintenance-free, drop-proof, shockproof, and backed by Meprolight's 12-year tritium illumination guarantee, these sights install directly into the factory dovetail with no slide modifications required.