Micro Sight Mounts for RTS3 Model Red Dot Sights The RTS3 uses the C-MORE mounting pattern, which is the same as the STS, STS2, and RTS2 sights, and can use all existing mounts for these sights. Since the RTS2 sight is longer on the front, the RTS2 specific mounts will be longer on the front when using with an RTS3 sight. We are in the process of updating existing RTS2 mounts to fit the RTS3 exactly for future availability.