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With limited exceptions, California law prohibits any person from manufacturing, importing into the state, keeping for sale, offering or exposing for sale, giving, lending, buying, or receiving a large capacity magazine.1 (A “large capacity magazine” is defined as any ammunition feeding device with the capacity to accept more than ten rounds, but does not include any.22 caliber tube ammunition feeding device, any feeding device that has been permanently altered so that it cannot accommodate more than ten rounds, or any tubular magazine that is contained in a lever-action firearm).2

In 2016, California voters also passed Proposition 63, which generally prohibited possession of large capacity magazines starting on July 1, 2017.3 The Legislature had previously grandfathered possession of large capacity magazines that were lawfully obtained before 2000, but because most of these magazines do not have identifying marks to indicate when they were manufactured or sold, police officers who came upon stashes of these magazines were unable to determine whether or not they were lawfully obtained. Proposition 63 required individuals who still own grandfathered large capacity magazines to permanently alter them so they cannot accommodate more than 10 rounds or to otherwise dispose of them before July 1, 2017 by selling them to a licensed firearms dealer, transferring them to law enforcement, removing them from the state, or destroying them.4

**Note that enforcement of Proposition 63’s restrictions on possession of large-capacity magazines have been temporarily delayed pending an ongoing legal challenge by the NRA’s California affiliate. To learn more about this case and the Giffords Law Center’s work to defend Proposition 63, visit our  Duncan v. Becerra   summary page.**

California law also generally prohibits any person from manufacturing, importing into the state, selling, giving, lending, buying, or receiving, any large capacity magazine conversion kit. A “large capacity magazine conversion kit” is defined as a device, or combination of parts from a fully-functioning large capacity magazine, capable of converting an ammunition feeding device into a large capacity magazine.5

Upon a showing of good cause, the California Department of Justice may issue permits for the possession, transportation, or sale of large capacity ammunition magazines between a licensed California firearms dealer and an out-of-state customer.6

Large capacity magazines may be manufactured for any federal, state, or local government or law enforcement agency, the military, or for use by agency employees in the discharge of their official duties, whether on or off duty.7 Large capacity magazines may also be purchased or loaned for the sole use as a motion picture, television or video prop.8 Such magazines may also be resold to law enforcement agencies, government agencies, or the military, pursuant to applicable federal regulations.9

 See our Large Capacity Magazines policy summary for a comprehensive discussion of this issue. 

  1. Cal. Penal Code § 32310.[]
  2. Cal. Penal Code § 16740.[]
  3. See Cal. Penal Code §§ 32310(c), (d).[]
  4. Id.; Cal. Penal Code § 16740(a) (excluding from the definition of “large-capacity magazine” any ammunition feeding device that has been permanently altered so that it cannot accommodate more than 10 rounds).[]
  5. Cal. Penal Code § 32311.[]
  6. Cal. Penal Code § 32315. The requirements for demonstrating “good cause” are set out at Cal. Code Regs. tit. 11, § 5480.[]
  7. Cal. Penal Code § 32440.[]
  8. Cal. Penal Code §§ 32445, 32450.[]
  9. Cal. Penal Code § 32450(c). For additional large capacity ammunition magazine regulations, see Cal. Code Regs. tit. 11, §§ 5480–84.[]