Without a valid and current firearms license, you cannot legally purchase any firearm other than a pellet gun anywhere in New Zealand.
The process for obtaining a basic firearms license is long, complicated and expensive. In other words, designed to weed out a broad portion of the population that the law deems unsuitable to possess a firearm.
http://www.seattleglobalist.com/2012/08/06/getting-strapped-in-new-zealand-shooting/5740
Only for the rich and powerful..
That's pretty much the way the politicians would like here in the US. The "Peons" don't need protection, they don't have anything worth protecting....