Here's what they have listed.
Now the fun stuff: Megatron should stand at around 12" tall - equal in size to his nemesis, Masterpiece Optimus Prime. In order to get such a hefty robot, this is going to be one huge gun! Megatron will be a Walther P-38, as he should be, and will be the defining action figure version of Megatron that we've always wanted.
I haven't opened my TRU Prime yet, so I wasn't sure of his height.
Here is the link http://www.bigbadtoystore.com/bbts/product.aspx?product=TAK11213&mode=retail