At least the USA put restrictions on civilians buying fully automatic weapons, which serve absolutely no recreational purposes other then killing people.
Not entirely true sir. There are some "restrictions" on all firearm purchases and yes, even more stringent ones for select-fire/full-auto firearms. But fully automatic firearms can indeed be owned by American citizens - the real restrictions are at the State level. In other words, in some states one cannot own one at all - but in many, with the proper federal documentation one can. (Statistically, there is virtually no violent crime associated with the use of such weaponry, since the Fed. Firearms Act of 1939)
There are several large, annual recreational events geared toward owners of just these weapons, and any number of smaller competitions and gatherings. I suppose "recreation" is in the eye of the beholder.
I guess "our ways are not your ways"so to speak.
I was not actually aware that New Zealand was so devoid of firearms or any enthusiasm for them. Either way, just different ways of viewing the firearm I suppose.