HI there,
I'm a new member of this site and just wanted to let you all know that I have a Magwell for the Ruger Mark III steel frame pistol available.
Here is a link to the website. The site is very basic as have just started it tonight!
http://waldronmw.wix.com/mddracing#!magwell-photos/c1ka
It works very well, comes with the Magwell and six magazine extensions. It takes all of about ten minutes to install and only needs a 1/8th drill bit (and hand drill) to get it mounted.
Thanks for looking.
Matthew