Just to clarify:
ARs and AKs were banned by name, regardless of features, in Kalifornistan. In addition, other non-named rifles were banned by features, though it was possible to remove the features to avoid the registration/ban on the non-named guns.
AR15s are legal to OWN in Kalifornistan, assuming they were legally purchased before 12/31/1999, and legally registered by 12/31/2000 (more or less). Registered guns cannot be transferred, and no new guns can be brought in. Registered guns must either be moved out of the state or turned in to the police when the registered owner dies; registration cannot be transferred, even to family members.
lpspinner listed the two Kaliban-legal AR15ish alternatives.
Although there are, theoretically, permits that the DOJ can issue to allow a new gun to be imported and registered, none have been issued, and none are likely to be issued.
A recent ammendment allowed late registrations by police, because many of them got busted for having unregistered "assualt weapons", or guns falsely believed to be "assault weapons", under the ill-defined new law. This was undermining the willingness of police to enforce the law, so an extension of the registration period was made for them.
-Troy