To fit following micro red dots
1. Sightmark mini shot reflex sigh
2. Vortex Razor/Viper/Venom micro red dot
3. Ade Advanced Optics rd3-001, rd3-02, rd3-009
4. Burris Fastfire micro red dot (some burris might require longer screws which is not included)
5. And similar Micro/Compact style mini Red dot sight