California also has a transfer law for many years. Buy a gun from an individual or at a gun show or
FFL dealer , plus there is a 10 day waiting period ( so called cooling off time ) after purchase and DOJ backround check . Both buyer and seller must be present to do the transfer.
FFL then keeps YOUR gun just purchased, the buyers goes back to retrieve it, gets a little training by the clerk , how to load and unload and operate the guns safety devices. Minimum fee is $25 for the state, some stores charge more for their time.
Jan 2018 ammo purchases/transfers will have a similar proceedure.