Originally Posted by MrBaldBastard

laws coming but action has certainly already been taken:

https://www.stuff.co.nz/national/chr...sque-shootings

Arden announced: As an interim measure to ensure the trade of the weapons ceased at 3pm on Thursday, the weapons had been re-categorised as requiring an E endorsement on a firearms licence, preventing their sale to people with A category licences.
"This will mean that no-one will be able to buy these weapons without a permit to procure from the police. I can assure people that there is no point in applying for such a permit."

All sales have been stopped, new laws will be about buying back existing guns.