That Air Ranger is a nice piece of kit. Can you get the gas refilled?
I have been to NZ a couple of times, mainly to kill things that were introduced, and I must say what a breath of fresh it was to be in a place that has not been ruined by wrist wringing, nanny state types who would ban everything etc etc .... . The second time i went over to enjoy some huntin' shootin & fishin' I left my guns at home due to the outrageous amount of paperwork I was asked to fill out. I simply went to the local hunting/fishing shop in Christchurch and hired it, with one piece of paper picked up at the airport to verify who I was- . After picking out a deer rifle and a 12g shottie the young bloke behind the counter said ,"would you like a suppressor with that".(Silencer). And he never asked to see my piece of paper/license. It would be a bastard if that ever changed. NZ is my sort of place.