Allspark member "Skunka-who?" has discovered an undocumented feature of the Transformers: Revenge of the Fallen Deluxe Wreckage figure, which he describes in this thread.  Essentially his two blade weapons can hook together into a single weapon, which can be mounted on either arm for awesome Darth Maul style melee combat!

Credit also to "NightViper" for the original image, which can also be seen in the thread.