I'm from NZ. I was very surprised to learn that our gun laws were quite lax up until the relatively recent mosque shooting in Christchurch - the assault-style weapon the shooter used was quite legal, including the special modifications he had made to make it better for killing people.
in the wake of that tragedy, things have gotten a lot stricter, though I'm afraid I can't provide specifics - while I love guns, my collections are confined to the virtual, and I really have no interest in owning one IRL.