Rainbow Magic Sight

I have aquired a Rainbow Magic Sight recently and can't find any info about it. The box states The Only Proven Shot Gun Sight in THE WORLD. It is / was manufactured by Rainbow Arms Corp. P.O. Box 397, Crystal Bay Nevada. It resembles a Reflex Sight. When you sight thru it there is almost like a Prism of multiple circles that cone down to one in the center. Anybody have info ? Thanks, JB.