Skorpius Hover Tank
A vehicle utilized exclusively by the Skitarii, the Skorpius basically serves the same function as a Rhino, with both transport and battle tank variants. Except it's a hovercraft. Not fancy anti-grav tech either, it's pretty much just a conventional hovercraft. Apparently using big-ass fans to float an armored vehicle on regular old air (something we can do in friggin M2) is now, and we quote: "barely understood, deadly technology from the Age of Darkness." Yeah.
Skorpius Dunerider
The Higgins Boat of 40k, the Dunerider works exactly the same as the WWII Landing Craft that inspired it: hit the beach battlefield, suppress enemies with the many stubbers mounted on it, and then drop the front ramp and have the Skitarii within re-enact the opening scene of Saving Private Ryan. It's basically a smaller and more advanced version of the Gorgon Armored Assault Transport. Honestly, the one thing that makes no sense at all is why the Imperial Guard apparently aren't allowed to use it, seeing as how the technology behind Sentinels and Plasma Guns is more complex than a Skorpius Dunerider.
Skorpius Disintegrator
A battle tank variant of the Skorpius. Looks similar to a rubber duck, oddly enough.