Indeed. In this country, anyone can own firearms (handguns are forbidden) so long as are able to obtain a Firearms Licence. This includes, all citizens, residents and immigrants over the age of 16. All they need do is...
1. Pass the "fit and proper" person test (which excludes criminals, ex-cons, the mentally ill, drug addicts, people with a history of violence, people with a restraining order against them, etc)
2. Pass the firearms safety test
3. Meet the criteria for safe and secure storage of firearms
4. Pay the fee for a firearms licence.
In our history, we have two spree shootings...
Kowhitirangi 1941 (Stan Graham)
Aramoana 1990 (David Grey)
...and the Firearms Regulations were considerably more lax at those times. We have not had a spree shooting in 28 years, and we've never had a school shooting. This is what good firearms licensing and regulation can do.