Police pulled over a vehicle in the South Auckland suburb this morning at around 10.25am and found live shotgun shells in the car.
The arrest has been capturedon camera, which shows three armed officers marching forward with rifles raised at their shoulders.
Footage also shows a person with their arms raised in the air above their head being ordered over a loudspeaker to walk backwards while the Eagle helicopter flies above.
Officers arrested an 18 year-old man and charged him with unlawful possession of ammunition.
A police spokesman said police had a dedicated team investigating this offending and were following positive lines of inquiry to hold those responsible for the shootings to account.
The arrest took place near a construction site at the intersection of Murphys Rd and Murphys Park Rd.
The gun crime spree has highlighted a drive-by shooting culture and has frustrated community leaders who blame poverty and the glorification of gang lifestyles for the shootings.
On Saturday, police were twice again called to Ōtara. At about 2.24pm, reports came in that a firearm had been discharged on Prestons Rd and there were also reports of a firearm being discharged around 10pm.