California
Penal Code PC § 34200
(a) A description of the relative occurrence of firearms most frequently used in the commission of violent crimes, distinguishing whether the firearms used were handguns, rifles, shotguns, assault weapons, or other related types of weapons.
(b) A description of specific types of firearms that are used in homicides or street gang and drug trafficking crimes.
(c) The frequency with which stolen firearms were used in the commission of the crimes.
(d) The frequency with which fully automatic firearms were used in the commission of the crimes.
(e) Any trends of importance such as those involving specialized ammunition or firearms modifications, such as conversion to a fully automatic weapon, removal of serial number, shortening of barrel, or use of a suppressor.