10rd magazine limit, unless you have grandfathered magazines.
Handgun safety certificate requirement.
10 day waiting period.
Smith and Wesson and Ruger no longer sell to California and there is no way to get new firearms from them now while having Californian citizenship.
.45 ACP has been banned.
Los Angeles City cannot be sold ammo/ship ammo to an address in Los Angeles City. Someone has to drive to a neighboring city to purchase ammo.
No suppressors.
No collapsable/foldable stocks.
No special ammunition.
Gun registration.
For those who actually want to go hunting, there's a "lottery" to even get that far.
.50 Caliber weapons have been completely banned.
Machine pistol/submachine gun "style" weapons as well as shorter rifles and shotguns are completely banned.
Bump-fire stocks and trigger accessories are completely banned, the only exceptions are sensitive triggers such as Geissele.
Some weapons are specifically banned even if the gun is assembled in a different way such as the SPAS-12.
In more recent news, handgun sales have doubled since 2010 because of collective fear that eventually there will be no handguns left to buy because of the imposed restrictions on gun manufacturers.