GW's plastic imperial sentinel kit. Painted to match with an existing Tallarn Desert Raiders army.
(http://www.customhobby.com/forumpics/%20td-sentinel.jpg)
You can find related threads here about the Buggies (http://www.customhobby.com/forum/index.php?topic=2745.0) and Hellhound (http://www.customhobby.com/forum/index.php?topic=2747.0)