There are still a lot of armed citizens in California, but it's pretty tough to buy semi-auto rifles. It's still a large market here, a lot of firearms are still being sold. So, maybe there wouldn't be a rifle behind EVERY blade of grass, but there would be quite a few. There will be semiauto rifles, they just won't have normal capacity magazines, or they'll have fixed magazines if you have a pistol grip. *sigh*
Yeah, it's pretty restrictive.