Just a Lego custom I came up with- a random cannon drone because I couldn't think of anyone who looks like this. If you can attach a name to this guy, I'd be happy. As with every MOC I make, I generally use grey parts, due to my lack of specifically-colored parts and lack of cash that I'm willing to fork over to Bricklink. He transforms into a cannon, not unlike G1 Galvatron. He has seven points of articulation (shoulders, waist, hips, and knees). This is him, next to my Siege: War for Cybertron Deluxe Class Hound, for comparison. I will post instructions below.
Cannon Drone Instructions Start with these pieces: Make a few basic assemblies for the torso: Build the legs: Arms: Head (Note: it isn't very visible, but a cone piece is what has been shoved into the headpiece. It's a bit hard to get it out of there, so you don't have to put it in there if you don't want to.): By now you should have the following assemblies: Put together the torso: Attach the legs to the hips and the arms to the shoulders: Attach the head: And, you're done!
Transformation (Yeah, I almost forgot that!) Firstly, straighten all of his limbs. They need to line up for this to work. Second, put his legs into a "sitting position," or right angle. Then, bend the feet, putting them forwards. They should veer off to each side a bit; that's good. The last step is optional; however, it adds to the look. Turn the cannon around, and lightly push the clips to the center of the bar. Straighten it all out. If you want to, add a little decor, and you're done!