We have background checks everywhere.
What Ca has is REGISTRATION and registration is the first step to universal confiscation.
there is no gun registration in california, i dont know where you got that from.
when you buy a gun they swipe your licence for the fed check, it comes back right away ok, then the purchase is done. 10 days later for long guns, 15 for handguns, you come back and pick up the gun. a pain, but frankly not the end of the world.