Privateer Press previews the Cygnar Light Warkjack, the Minuteman.
From their website:
The Minuteman is a product of numerous advances in mechanikal warfare. Utilizing an exactingly designed series of compression chambers, the warjack can launch itself short distances by venting its heartfire through a special propulsion system. It is well suited to annihilating entire swathes of infantry with its short-range grenade launchers upon landing, clearing its line of sight to an intended target. The Minuteman can then unload its dual slug guns into harder targets.