Chuck's Reviews Transformers Rise of the Beasts Beast Weaponizers Optimus Primal and Prime
 

If there's one gimmick in the ROTB main toyline that will attract collectors it's the Beast Weaponizers, small robotic animals that turn into weapons like blasters, swords, crossbows, and chainsaws; the last two are featured here with Optimus Primal and Optimus Prime. Both Primal and Prime are basic figures but feature more articulation than the Beast Combiner figures, which makes them a bit more fun. The Weaponizers remind me of the Arms Micron era of Transformers and complement the larger robots well. Between the two I feel Optimus Prime is better due to having more articulation and a more pronounced alternate mode.

http://www.youtube.com/watch?v=cIeCYrRol-U