The RD30 from BSA is a 5 MOA 30mm red dot sight in a lightweight and affordable package. Features a wide field of view and illuminated dot for daylight and low-light use with 11 brightness settings. Provides unlimited eye relief with a 1x magnification and adjustable wind and elevation adjustments at 1/2 MOA. The multicoated lens is both fogproof and waterproof. Fits 3/8â?쳌 and 5/8â?쳌 rings and mounts.