A beneficiary who spent tens of thousands of dollars buying guns which he sold to gangs has been jailed for five years and ten months at Auckland District Court.
Passing sentence, Judge Nevin Dawson described the gravity of Peter James Edwards offending as "extremely high".
Edwards admitted his blackmarket business included removing the serial numbers and modifying the rifles and shot-guns to make them pistol sized and easy for his criminal customers to conceal.
Police say he'd "carved quite a niche" out of a market that's heavily linked to drugs.
Edwards was also sentenced for supplying methamphetamine at least 42 times, including to his teenage daughter.
Edwards bought most of the weapons at gun city stores in Auckland and Christchurch. More than 60 of the 70 guns he bought are still missing and police believe they're now being used by gangs in west Auckland.