The teenager is charged with the manslaughter of his friend Shaun Townsley who was shot dead on January 12 while he and friends were drinking in the backyard of a Manurewa home and shooting targets off a fence.
Police were called by the ambulance service, which rushed Mr Townsley to Middlemore Hospital, but he died soon after arrival.
At the time, Detective Inspector Dave Lynch said the death served as a "painful reminder" airguns were not toys and needed to be used "in a controlled environment by responsible people with appropriate target awareness and knowledge of their power".