A former firearms licence holder who supplied a significant number of guns to the black market has been jailed for two years and seven months

Builder Mark Colin Palmer was sentenced in the Auckland District Court on 10 charges involving firearms, class A drugs and explosives.

Not all the guns have been recovered -- but two were found at the home of a patched gang member shortly after Palmer bought them from Auckland gun stores.

One rifle had been illegally cut down to a pistol and another had its serial number erased.

Detective Inspector Albie Alexander says Palmer abused the privilege of holding a firearms licence and his offending was highly premeditated for financial gain.