The Meprolight Micro RDS Red Dot Sight Kit for Glock 17 is small, rugged, and energy efficient, with a clear aiming point for all light conditions, and a large display window. For pistols, it serves as the main aiming sight, offering fast target acquisition at close distances. It fits a large variety of handguns thanks to its patented quick release mounting (MEPRO MicroRDS adaptor). The adaptor allows the use of an optical sight alongside a backup tritium sight. There is no need to replace the gun