The bad news for the California airsoft community is that Governor Jerry Brown signed SB1315, which will make Los Angeles County a tough zone for airsoft players. With SB1315 taking into effect in 1st of January 2013, there is talk that the airsoft industry would take it to court, in coordination with their allies against it. So with a few months remaining before it takes effect, questioning SB1315 as in conflict with the Federal law might be a good measure to test the bill if it stands up to Federal statutes.

But there's another thing which passed the California Assembly and it was under the radar and a good measure for the Airsoft community for them to show that they are responsible members and users of replica firearms as announced by the Airsoft Safety Foundation. Sponsored by Assembly Member Solorio and is now enrolled for submission to the Governor to sign it is AB (Assembly Bill) 2333 which us "An act to add Section 19920 to the Penal Code, relating to BB devices."

SECTION 1.

Section 19920 is added to the Penal Code, to read:

19920.
(a) Any person who keeps a BB device within any premises that are under the person’s custody or control, who knows or reasonably should know that a minor is likely to gain access to that BB device without the permission of the minor’s parent or legal guardian, and a minor obtains access to that BB device and thereafter carries the BB device off-premises and openly displays or exposes the BB device in a public place in violation of Section 20170, may be subject to the following by a local governmental entity:

(1) For the first instance, a local governmental entity may issue a written warning.
(2) For the second instance, a local governmental entity may impose a civil fine not to exceed one hundred dollars ($100).
(3) For a third or subsequent instance, a local governmental entity may impose a civil fine not to exceed two hundred dollars ($200).
(b) A written warning or civil fine issued or imposed pursuant to this section may only be imposed and administered by a local governmental entity acting under the authority of, and at the discretion of, a city, county, or city and county.
(c) If a local governmental entity chooses to impose a fine pursuant to this section, it shall provide notice to the person to be fined of the alleged violation, including a description of the conditions that gave rise to the allegation.
(d) As used in this section, “off-premises” means premises other than the premises where the BB device was stored.

To understand further, you can check the full text of AB 2333 here.