Bunting said the search warrant resulted in a range of Sim cards and phones allegedly used in the offending being found.
A sawn-off shotgun, a Ruger 270 bolt-action rifle, and ammunition were also recovered.
Two men found at the address are now before the Waitākere District Court, Bunting said.
The pair, aged 20 and 51, have been jointly charged with two counts of unlawful possession of a firearm and one count of unlawful possession of ammunition.
The 20-year-old was also charged with possessing equipment capable of facilitating crimes.
Bunting said inquiries were continuing and more arrests were possible.
Police were working with other agencies to target similar offending.
“We know this sort of scam is arranged by transnational organised crime groups, who utilise local actors to carry out their deeds.”
Department of Internal Affairs digital messaging manager Joe Teo said collaboration was key to detecting, disrupting and preventing the spread of harmful digital messages.
“This operation demonstrated how by working together we can successfully protect New Zealanders from criminals who seek to steal their private information and money.
“The discovery of firearms during the search warrant shows that these are serious offenders who are targeting New Zealanders.”