Police have admitted up to 66 gun dealers had access to the names, phone numbers, addresses and bank details of over 30,000 firearms owners due to an error in the way the gun buyback registry was administered by an external software company.
But they say only one of those 66 dealers went onto the registry and saw the private information - and notified police as soon as they were aware of the mistake.
Police Minister Stuart Nash said the breach was NOT a hack and he had a warning for anyone else who accessed the information.
The Council of Licenced Firearm Owners - or COLFO - say that some of their members saw the data error too.
COLFO's secretary Nicole McKee speaks to Philippa Tolley.