Trijicon Docter Mount for ACOG with bosses mounts DOCTER Red Dot Sight on Trjicon TA01NSN & TA31DOC ACOG scopes. This Red Dot Sight Accessory by Trijicon is designed for DOCTER, Burris Fastfire, Vortex Venom and Vortex Viper sights. It does not fit Trijicon RMR.