I searched but I'm still uncertain. Are two barrel, two shot, break action Derringers exempt from the roster? I found this but could not tell if it meant to include Derringers since it states "single-shot."
12133.
(b) The provisions of this chapter shall not apply to a
single-shot pistol with a barrel length of not less than six
inches and that has an overall length of at least 101/2 inches
when the handle, frame or receiver, and barrel are assembled.
12133.
(b) The provisions of this chapter shall not apply to a
single-shot pistol with a barrel length of not less than six
inches and that has an overall length of at least 101/2 inches
when the handle, frame or receiver, and barrel are assembled.

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