Hi, well I've been working on a few concepts of mine.
Here is the Stinger Artillery tank.
Used by The UNCS, the stinger is capable of firing a mini nuke and HER (high explosive rounds) Huge distances. Creating much destruction to anything it targets. It is mobile when not moving, but to fire it must extend its arms out to create an stable platform for exact targeting. Though They are extremely powerful, becuase of their complexity they are rather rare to see. But the Covenant fear this powerfull machine, nicknaming it "Grunt Squelcher"
Stinger
[Edited on 08.26.2009 8:00 AM PDT]