Australia seems reasonable to me.  The buyback worked and most people willingly turned in handguns.  Gun crime including mass murder is way down.  "You have to belong to a club" and get 6 months of training?  What a hardship! (sarcasm) and isn't firearms training a good idea if you're going to use a firearm?

As I've written here before, I have owned firearms and hunted with them since the age of thirteen (I'm pushing 70).  I trained under NRA guidelines shooting targets with an air rifle starting at age 8.  That's five years of supervised training.  I don't consider that to be unreasonable.  If I had to join a club, qualify once a year, register, license, and insure each firearm, I would probably sell a few of them but I THINK IT WOULD BE A GOOD IDEA!  Considering the yahoos who shoot up the countryside using hunting season as an excuse, and the tens of thousands of criminals and incompetents who own and use guns, restrictions are needed.