I pic i felt like doing of Rex back when he was in the Lombax Praetorian Guard before the attack on Fastoon, this pic is actually just as the attacks started and he grabbed the first weapon he came across which happened to be a Pyrociter.
The patch on his arm is the logo of the platoon he was in "Hellhounds", Commanded by none other than Captain Slade.
Rex © RevanAC
Uniform Design © RevanAC
Lombaxes © Insomniac Games