I believe it was orginally developed for the Wildey, but I have never seen or heard reference that any of those guns were ever produced in 9mm Win Mag. LAR chambered it in the Grizzly, but if you put a call into LAR, they will deny it. However, the late Bob Milek, wrote an article for Guns and Ammmo magazine on the Grizzly chambered in 9mm Win Mag back in 1984. Then AMT cracked out a few for they AutoMag III.