The Magna Ring was for S@W revolvers. just do a google search and one well find a lot of info
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&cad=rja&ved=0CFEQFjAJ&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FPersonalized_gun&ei=IOQJU5H3MYrkyAGC-YDoAQ&usg=AFQjCNHFN9UBPwJJ—c5wtQMckcsGqYRWg&bvm=bv.61725948,d.aWc