G1 Megatron papercraft looks awesome but can't transform into a pistol

Go download Monkeyrum's amazing G1 Megatron papercraft. He writes: "The original base model was done by G. 'Alpha-Prime' Civita for the Transformers Quake player pack. I then took it and redid about 90% of the actual mesh and developed a new texture from scratch." The paper Megatron stands at 12.5 inches tall. I want Optimus!