A New Zealand man, 30, who killed an 18-year-old boy for spraying him with a water pistol has been jailed for seven years.

Myron Robert Alf Felise​ killed Eli Holtz after the teenager shot him with a water gun in the Auckland CBD last January.

Felise​ pleaded guilty to one charge of manslaughter and was sentenced to seven years in jail in the Auckland High Court.

Eighteen-year-old Eli Holtz was killed by Myron Robert Alf Felise, 30, after he shot Felise with a water pistol. Holtz was restricted by a seat belt in the passenger seat of a stationary car while Felise punched him six times until he was unconscious. He died the next day

Crown prosecutor Brian Dickey said it was a 'very very serious assault' and 'entirely unnecessary'. Felise and six others were charged with murdering liquor store owner Navtej Singh during a robbery in 2008. Felise was only convicted of aggravated robbery

Eli's mother Kirsten Holtz said 'there are no winners in this tragedy', Stuff reported.

'We've lost our son Eli and the Felise family have lost their son for a season as well. Our hearts go out to them,' Mrs Holtz said.

'Nothing can bring our Eli back to us.'

CCTV footage shows Holtz's last moments before he was beaten unconscious by Felise. The video will not be shown to the public because Eli's family do not want to be retraumatised

Eli Holtz was a passenger in his friend's car when he fired a water pellet at Felise from his Sniper King water pistol.

The car had stopped at traffic lights when he carried out the light-hearted prank but Felise didn't see the funny side.

Felise had been drinking at a pub and was walking down Queen St.

A friend tried to restrain Felise who approached the car and punched the teenager six times until he passed out.

Holtz was taken to Auckland City Hospital where he was put on life support.

He died the next day.

Eli Holtz carried out a light-hearted prank on January 27, 2017 and died the next day. Over a year later his killer has been sentenced to 7 years in jail. 'There are no winners in this tragedy,' his mother Kirsten Holtz said

Crown prosecutor Brian Dickey said it was a 'very very serious assault' and 'entirely unnecessary'.

Felise and six others were charged with murdering liquor store owner Navtej Singh during a robbery in 2008.

Only Anitilea Chan Kee who pulled the trigger was found guilty while Felise was was convicted of aggravated robbery.