California law:
http://leginfo.legislature.ca.gov/faces/codes.xhtml
Most, but not all, California laws regarding firearms are in the Penal Code
California Code of Regulations:
http://ccr.oal.ca.gov/
Most California regulations regarding firearms are in Title 11 Law.
California Jury Instructions:
http://www.courtinfo.ca.gov/jury/cri...yinstructions/
California Attorney General - Forms page:
http://oag.ca.gov/firearms/forms
California Attorney General - FAQ page:
http://oag.ca.gov/firearms/faqs
Federal law: US CODE -
http://uscode.house.gov/browse/preli...edition=prelim
Most firearms-related US Code is Title 18 Chapter 44
Federal law: ATF Regulations -
http://www.ecfr.gov/cgi-bin/text-idx...7/27tab_02.tpl
Most ATF regulations are in Title 27
The Calguns Foundation Wiki -
http://wiki.calgunsfoundation.org/index.php/Main_Page
Thinking in 'legalese'
A little preparation goes a long way. Laws are generally not written in 'plain english' even though a statute may use english words.
“Guide to Reading, Interpreting and Applying Statutes.”, from the Georgetown law school, should help.