A robot originally built for the **new Practice/Singleplayer mode** back in *Release 6.0*
Images also show off the **Elite** variant (red with orange stripes), which will start spawning after some play time in SP, and the regular variant stops spawning. The Elite variant can also see you from slightly further away, and aims more accurately.
Not combat worthy, but works well for SP
Note: in singleplayer, the game might replace out the blocks, so you might see an artillery truck that's green instead of orange, for example!
You have probably seen it on a loadingscreen too :)