I Found it!
Minimum Age to OC
i am new here but i found this :
Can a minor (under 18, years of age) legally possess a firearm and ammunition at the same time?
Written by Administrator
Monday, 29 November 1999 16:00
Yes, but restrictions apply. A minor may have a rifle or shotgun in his or her possession, but not a handgun, unless he or she has the "prior written consent" of his or her parent or legal guardian or is accompanied by his or her parent or legal guardian. Furnishing any firearm to a minor without the appropriate permission of the minor's parent or legal guardian is illegal. Section 12078(p) P.C. A minor may not possess any live rifle, shotgun, or handgun ammunition without the written consent or accompaniment of his or her parent or legal guardian, except while going to or from an organized lawful recreational or competitive shooting activity or lawful hunting activity. Section 12101 (a) and (b) P.C.
Last Updated ( Monday, 16 February 2009 14:32 )
I also found this from the Handgun Safety Cert for California
Possession of a Handgun or Live Ammunition by Minors
It is unlawful for a minor to possess a handgun or live ammunition unless one
of the following circumstances exists:
•The minor is accompanied by his or her parent or legal guardian and the
minor is actively engaged in a lawful recreational sporting, ranching or
hunting activity, or a motion picture, television or other entertainment
•The minor is accompanied by a responsible adult and has prior written
consent of his or her parent or legal guardian and is involved in one
of the activities cited above; and
•The minor is at least 16 years of age, has prior written consent of his
or her parent or legal guardian, and the minor is involved in one of
the activities cited above (PC section 12101).
From the Turner's Outdoorsman site (even though this does not anwser your question)
1. What is the minimum legal age to purchase a firearm in California?
(a). 18 years of age for rifles or shotguns
(b). 21 years of age for handguns
Federal Law prohibits the sale of shotguns that are transferred with a pistol-grip only to persons under 21 years old (FFL Newsletter, August 1998)