I made this mainly from car, computer and plumbing parts. The centre core chassis is a steering wheel height adjuster unit.

There is a harness to go around your neck and there is also a belt  that provides some padding between the operator and the gun.

Steampunk is defined by dictionary.com as:

“a subgenre of science fiction and fantasy featuring advanced machines and other technology based on steam power of the 19th century and taking place in a recognisable historical period or a fantasy world.”