California Code, Government Code - GOV § 8571.5

Nothing in this article shall authorize the seizure or confiscation of any firearm or ammunition from any individual who is lawfully carrying or possessing the firearm or ammunition, or authorize any order to that effect, provided however, that a peace officer who is acting in his or her official capacity may disarm an individual if the officer reasonably believes it is immediately necessary for the protection of the officer or another individual. The officer shall return the firearm to the individual before discharging the individual, unless the officer arrests that individual or seizes the firearm as evidence pursuant to an investigation for the commission of a crime.