What I’d like to know is, how did they build the mech?

Transcript:

Mr Bugg is crouching behind a rock. He is wearing tactical goggles and holding a rifle in the air, while his other hands shades his eyes, scouting forward. Behind him, Mrs Bugg is strapped into a gigantic mech, her legs dangling and her hands operating the controls. Above her head, the mech has a hardpoint with a rocket. What they are hunting with this amount of firepower is anyone’s guess.

The text reads: “The buggs are doing some serious hunting with cyberweapons.”