With a certain class of license, military style semi-automatic weapons (in unlimited numbers) could be acquired legally. Some 14,000 of these weapons are thought to be legally owned in New Zealand.
Loop holes in current legislation abound. These make it possible to modify weapons and obtain large magazines, and even to buy armour-piercing bullets. Why, in a peaceful, democratic and open society, does anyone need a military-style automatic weapon and armour piercing ammunition?