The AmeriGlo I-Dot Night Sight Set is engineered for rapid target acquisition in defensive situations featuring green tritium illumination and a unique dot-over-dot configuration for quick vertical sight alignment.AmeriGlo I-Dot Night Sight Set for Glock 42/43Green tritium front sight .140" wide with white front outlineGreen tritium rear sight .165" wide with square notchExtended rear sight design for increased sight radiusGlare reducing undercut rear faceSteel construction with matte black finishDot-over-dot method for fast target acquisitionIdeal for concealed carry and defensive applications these sights provide superior low-light performance and enhanced accuracy for Glock 42 and 43 pistols.