This papercraft is a Silver Kamen, based on the same named TV series, the paper model was created by dacotu. Silver Kamen was a 1971 Henshin Hero show using many of the staff from Ultra Seven that lasted 26 episodes.
Four siblings must protect the secret of their father's creation- a rocket that can travel interstellarly. Armed with laser pistols, they fight against the Uchuujin. One of the siblings can transform into Silver Kamen, a masked and silver-suited hero, when things get rough! The series was retooled 10 episodes in and turned into an Ultraman clone, with Silver Kamen growing to giant size and the siblings using the rocket to travel interplanetary to stop the Uchuujin.