At this time I made this install video, this is what was needed to make an AR15 compliant in California in regards to magazines. As that state seems to change its laws on a near daily basses, be sure to verify the laws.
Also, those who are in Commiefornia go ahead and follow TDS or The Daily Shooter. He updates regularly on all of the ludicrousness that is CA gun laws. He’s got some great content.