California Code, Penal Code - PEN § 31905

(a) As used in this part, “firing requirement for handguns” means a test in which the manufacturer provides three handguns of the make and model for which certification is sought to an independent testing laboratory certified by the Attorney General pursuant to Section 32010. These handguns may not be refined or modified in any way from those that would be made available for retail sale if certification is granted. The magazines of a tested pistol shall be identical to those that would be provided with the pistol to a retail customer.

(b) The test shall be conducted as follows:

(c) A handgun shall pass this test if each of the three test guns meets both of the following:

(d) If a pistol or revolver fails the requirements of either paragraph (1) or (2) of subdivision (c) due to ammunition that fails to detonate, the pistol or revolver shall be retested from the beginning of the “firing requirement for handguns” test. A new model of the pistol or revolver that failed due to ammunition that fails to detonate may be submitted for the test to replace the pistol or revolver that failed.

(e) As used in this section, “malfunction” means a failure to properly feed, fire, or eject a round, or failure of a pistol to accept or eject the magazine, or failure of a pistol's slide to remain open after the magazine has been expended.