CA Penal Code § 31910 (2021)
2021 California Code|Penal Code - PEN|PART 6 - CONTROL OF DEADLY WEAPONS|TITLE 4 - FIREARMS|DIVISION 10 - SPECIAL RULES RELATING TO PARTICULAR TYPES OF FIREARMS OR FIREARM EQUIPMENT|CHAPTER 4 - Handguns and Firearm Safety|ARTICLE 4 - Unsafe Handgun and Related Definitions|Section 31910.

31910.  As used in this part, “unsafe handgun” means any pistol, revolver, or other firearm capable of being concealed upon the person, for which any of the following is true:(a) For a revolver:(1) It does not have a safety device that, either automatically in the case of a double-action firing mechanism, or by manual operation in the case of a single-action firing mechanism, causes the hammer to retract to a point where the firing pin does not rest upon the primer of the cartridge.(2) It does not meet the firing requirement for handguns.(3) It does not meet the drop safety requirement for handguns.(b) For a pistol:(1) It does not have a positive manually operated safety device, as determined by standards relating to imported guns promulgated by the federal Bureau of Alcohol, Tobacco, Firearms and Explosives.(2) It does not meet the firing requirement for handguns.(3) It does not meet the drop safety requirement for handguns.(4) Commencing July 1, 2022, for all centerfire semiautomatic pistols that are not already listed on the roster pursuant to Section 32015, it does not have a chamber load indicator.(5) Commencing July 1, 2022, for all centerfire or rimfire semiautomatic pistols that are not already listed on the roster pursuant to Section 32015, it does not have a magazine disconnect mechanism if it has a detachable magazine.(6) (A) Commencing July 1, 2022, for all semiautomatic pistols that are not already listed on the roster pursuant to Section 32015, it is not designed and equipped with a microscopic array of characters used to identify the make, model, and serial number of the pistol, etched or otherwise imprinted in one or more places on the interior surface or internal working parts of the pistol, and that are transferred by imprinting on each cartridge case when the firearm is fired.(B) The Attorney General may also approve a method of equal or greater reliability and effectiveness in identifying the specific serial number of a firearm from spent cartridge casings discharged by that firearm than that which is set forth in this paragraph, to be thereafter required as otherwise set forth by this paragraph where the Attorney General certifies that this new method is also unencumbered by any patent restrictions. Approval by the Attorney General shall include notice of that fact via regulations adopted by the Attorney General for purposes of implementing that method for purposes of this paragraph.(C) The microscopic array of characters required by this section shall not be considered the name of the maker, model, manufacturer’s number, or other mark of identification, including any distinguishing number or mark assigned by the Department of Justice, within the meaning of Sections 23900 and 23920.(7) The Department of Justice shall, for each semiautomatic pistol newly added to the roster pursuant to Section 32015, remove from the roster exactly three semiautomatic pistols lacking one or more of the applicable features described in paragraphs (4), (5), and (6) of subdivision (b) and added to the roster before July 1, 2022. Notwithstanding those paragraphs, each semiautomatic pistol removed from the roster pursuant to this subdivision shall be considered an unsafe handgun. The Attorney General shall remove semiautomatic pistols from the roster pursuant to this subdivision in reverse order of their dates of addition to the roster, beginning with the semiautomatic pistol added to the roster on the earliest date and continuing until each semiautomatic pistol on the roster includes each of the applicable features described in those paragraphs.(Amended by Stats. 2020, Ch. 292, Sec. 2. (AB 2847) Effective January 1, 2021.)