Actually untrue, you can buy a gun out of state. Your only problem is if Ca bans the simple possesion of the item, then you're screwed if you get caught with it. As a gun dealer in Fl. say, I have to follow Fl., and federal law. I also can't SHIP to Ca., if the weapon is banned as I place my self under their jurisdiction the second I do so. On the other hand, if you show up in sunny So. Fl. and pass the background check, and wait the 5 days, the Governator can kiss my ass. The only relevant question is whether you break the law in Ca. just from owning it, and according to the law you quoted it doesn't seem so. I would sure as hell ask a lawyer first though. 
FQ13
If you acquire a handgun outside the state and bring it into the state you have become what is called a personal handgun importer and:
Any person who meets the definition of a personal handgun importer who moves into
California with the intention of establishing residency in this state, must report his or her ownership
of any handgun acquired outside California to the Department of Justice within 60 days.
A personal handgun importer means an individual who meets specific criteria, which
includes, but is not limited to, any person age 18 or older, who is not a licensed firearms dealer or
manufacturer, and who owns and intends to possess within this state on or after January 1, 1998, any
pistol, revolver, or other firearm capable of being concealed upon the person that is not an assault
weapon or machinegun, as defined by law. (Penal Code § 12001(n).)
Personal handgun importers shall report handgun ownership by choosing one of the
following options:
• Forward by prepaid mail or deliver in person to the Department of Justice, a report
prescribed by the department. Forms are available from the Department of Justice,
firearms dealers, law enforcement agencies, and the Department of Motor Vehicles;
• Sell or transfer the firearm in accordance with the provisions of Penal Code section
12072(d);
• Sell or transfer the firearm to a dealer licensed pursuant to Penal Code Section
12071;
• Sell or transfer the firearm to a sheriff or police department. (If this option is chosen,
individuals should notify the agency in advance that they intend to transport the handgun to that
agency, and it should be transported unloaded and in a locked container). (Penal Code
§§ 12026.2 (a)(18), 12072(f)(2)(A).)