The Trijicon HD XR Night Sight Set for S & W C. O.R. E. is an elite iron sight upgrade specifically designed for precision shooting on Smith & Wesson M & P C. O.R. E. and M & P M2.0 Optics Ready pistol slides. Machined from rugged steel, this configuration features an ultra-thin 0.122-inch front post that expands your side-to-side sight window, delivering an enhanced field of view for extended-range target tracking and clean point-of-impact visibility. The front sight pairs a bright green tritium core with an aggressive, photoluminescent yellow outline ring that accelerates daylight eye index, while the blacked-out face of the rear "U" notch eliminates distracting glare. Operating completely battery-free via self-luminous tritium lamps, the sights remain highly visible in low-light environments and are built with a hooked rear profile to facilitate single-handed slide manipulations in emergency scenarios. Trijicon HD XR Night Sight Set w/ Green Tritium Rear & Yellow/Green Tritium Front for M& P C. O.R. E, M& P M2.0 Optics Ready SA640-C-601173