I think all I need is a barrel swap but couldn't get any info on frame size. If it is a large frame I am good to go. It has the "better hammer" and Chrome finish plus a couple of other goodies versus my Hunter. I'm selling the .40 guts to convert it over to a 10mm and if I can find the right person may have the slide remarked 10mm. So far I haven't dug really far into my Witness guns but may swap out the safety to an ambi and slap on a flared magwell plus grips. :o
The true 10mm version has the 4 holed lightened slide which I wasn't a fan of. If I'm correct the .40 and 10mm should be close enough in dimensions to work fine.
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=361910246