John117, also known by his rank as Master Chief, is a SpartanII super soldier serving under the United Nations Space Command. Accept the mission and jump into action with POP! Master Chief from Halo. Celebrate the 25th Anniversary of Halo by recruiting POP! Master Chief with M6D Magnum for your POP! Games collection. Vinyl figure is approximately 4.4 in (11.2 cm) tall.