About the only silly thing they did here with the fire arms licence was that although the person is licenced, the police have no clue as to how many, or who owns what because they have no record of the actual fire arms. We tried to get the guns registered, but they said it was too hard, shotguns were never registered, only rifles, pistols are, and were generally illegal except for special permits.
Some of our Military Vehicles club guys have de-activated BREN Guns, replica 30 cal , and .5 machine guns, a 40 mm Bofors (fires blanks), and a 25 pounder (fires blanks), They also have some active heavy machine guns, some WW2 German, others WW2 British, and American, these have been used at such outings as Wings Over Wanaka, along with aerial attacks with sound effects from the aircraft, and air explosions of petrol vapour.
Ian S C