You can keep these key features

California defines the term “Semiautomatic” to mean “a firearm functionally able to fire a single cartridge, eject the empty case, and reload the chamber each time the trigger is pulled and released.” 11 C.C.R. § 5471.
While an AR15 style firearm equipped with the Kunvirt Fire Control Group is functionally able to fire a single cartridge, eject the empty case, and reload the chamber with a trigger pull, it cannot do this each time the trigger is pulled and released without first manually cycling the safety selector from the “fire” position, back to “safe”, and then back to “fire”.
A firearm equipped with the Kunvirt Fire Control Group is not “semiautomatic” as that term is defined under DOJ regulations.
Because a firearm equipped with the Kunvirt Fire Control Group cannot lawfully be classified as “semiautomatic” under California law, such firearms cannot be classified as “assault weapons” under Penal Code section 30510 or Penal Code section 30515.
As applied to AR-15 rifles equipped with the Kunvirt Fire Control Group, this would mean the rifle could be equipped with any of the expressly listed features discussed above without violating California’s “assault weapon” restrictions.
Kunvirt Fire Control Group Operation