Corporal Andrew Garthwaite, 26, lost his arm when a rocket propelled grenade exploded during an operation in Helmand, Afghanistan, in 2010.
But now he has benefited from a revolutionary form of surgery which involved the rewiring of his nerve system.
Cpl Garthwaite, from South Shields, said: "When I first got told about the operation I thought it was some sort of fairy tale, that someone was taking the mickey.
"But here I am today with this arm that is fitted and works off my mind. It's unbelievable."
The war veteran has spent 18 months learning how to operate his new arm with his mind by focusing his thoughts.
Today he demonstrated his ability to carry out every day tasks such as potting a plant and making a jam sandwich.
"It has been a really long journey, enjoyable in some places but frustrating in others," he said.
"I'm just glad it's coming to an end on Friday.
"I'm going to have a nice Christmas with the family and my wife. I'd like to go in to TV presenting in the future. Whatever doors open, I'm looking forward to what is out there."
The 26-year-old was praised by one of the men responsible for his rehabilitation.
Tim Jones, a rehabilitation consultant at Headley Court who treated Cpl Garthwaite, said: "He's shown incredible resilience to get to today. You have to rewrite your whole brain.
"There is no reason why this shouldn't be allowed on the NHS too."