Two young occupants of a car were spoken to by police.
Whangarei District Council contractors working on the footpath paused briefly when police arrived before getting back to work.
People and vehicles moved freely and there was no palpable sense of armed police around.
Acting Sergeant Robert Eke could not say whether the man carrying a replica firearm would be charged.
The incident was not linked to a house fire earlier in the day, he said.
Meanwhile, police arrested two of four young men who allegedly assaulted a car owner and drove away in his vehicle on Maunu Rd about 11.30am yesterday.
The car was recovered on Otaika Valley Rd about midday. Officers were last night looking for the driver and a passenger.