I’m going to assume he pulled up short of also adding in the ability to self-destruct if it takes to many knocks on a convention floor.
Gryphon is an experienced props and armour builder who spent around six weeks making the costume, using the actual 3D model from the game as the basis for his work. He tells me it stands around 7 feet tall, and weighs almost 50lbs.
Here’s some video of the mech in action:
And here are some photos of the suit: