The Ed Brown HD XR Front Night Sight was specifically created to address the needs of tactical shooters who need a precise sight picture with high visibility in any light condition. The green tritium night sight is ringed in bright orange photo-luminescent paint. This is the ideal combination for high visibility day or night, and will retro perfectly to any Ed Brown 1911 in service. Combined with any style of plain black rear sight, this unique combination increases visibility and quickens front sight acquisition-even in transitional lighting. Green tritium lamps are warranted for 12 years from date of manufacture by Trijicon. Mfg: Ed Brown