Section 16640 Of Division 2. Definitions From California Penal Code >> Division 2. >> Title 1. >> Part 6.

. (a) As used in this part, "handgun" means any pistol, revolver, or firearm capable of being concealed upon the person.
  (b) Nothing shall prevent a device defined as a "handgun" from also being found to be a short-barreled rifle or a short-barreled shotgun.