Got some new blue Box Elder burl grips for my SR1911 Cmdr from Lonestar Custom Grips ( http://www.lonestarcustomgrips.com/ ) & thought I'd show them off here.
From the pic I'd say it is made of pot metal. I have a CMDR and haven't had a lick of trouble with the sights. Of course I just bought it & haven't shot it yet. :D