reflector sight
Type of non-magnifying optical sight where the aiming point light is projected onto a partially reflective sighting window
en-GB/ɹɪˈflɛktə ˈsaɪt/
en-US/ɹɪˈflɛktɚ ˈsaɪt/
Type of non-magnifying optical sight where the aiming point light is projected onto a partially reflective sighting window