After a period of 6 months in a shooting association with regular training at shooting range ...
First of all, a police investigation about shooter's past, mainly on files about the ban on gun possession and convictions of all kinds.
Then, if everything is clear, you get an authorisation to buy and/or keep : 5 guns maximum for the first 2 years, then 15 guns for the next 5 years with a maximun of 2000 ammo each year and for each gun.
Then, for each period of 5 years we have to renew the authorisation request.