So I pretty much have had this arm design in my head since 2010 but never did something with it becouse I never knew how I would do it. Then the creature gearboxes inspired me to finally make it I gues.
the rest of the moc I just trew together (it's ugly I know).
Once I get my hands on some more 2016 creature gears I'm going to slim this function down so it doesn't look like a cube. It's supposed to be a gun that extends when it needs to be fired.