Ammunition and magazine laws in Washington

(1) No person in this state may manufacture, import, distribute, sell, or offer for sale any large capacity magazine, except as authorized in this section.
(2) Subsection (1) of this section does not apply to any of the following:
(a) The manufacture, importation, distribution, offer for sale, or sale of a large capacity magazine by a licensed firearms manufacturer for the purposes of sale to any branch of the armed forces of the United States or the state of Washington, or to a law enforcement agency in this state for use by that agency or its employees for law enforcement purposes;
(b) The importation, distribution, offer for sale, or sale of a large capacity magazine by a dealer that is properly licensed under federal and state law for the purpose of sale to any branch of the armed forces of the United States or the state of Washington, or to a law enforcement agency in this state for use by that agency or its employees for law enforcement purposes;
(c) The distribution, offer for sale, or sale of a large capacity magazine to or by a dealer that is properly licensed under federal and state law where the dealer acquires the large capacity magazine from a person legally authorized to possess or transfer the large capacity magazine for the purpose of selling or transferring the large capacity magazine to a person who does not reside in this state.
(3) A person who violates this section is guilty of a gross misdemeanor punishable under chapter 9A.20 RCW.
[ 2022 c 104 s 3.]

(26) "Large capacity magazine" means an ammunition feeding device with the capacity to accept more than 10 rounds of ammunition, or any conversion kit, part, or combination of parts, from which such a device can be assembled if those parts are in possession of or under the control of the same person, but shall not be construed to include any of the following:
(a) An ammunition feeding device that has been permanently altered so that it cannot accommodate more than 10 rounds of ammunition;
(b) A 22 caliber tube ammunition feeding device; or
(c) A tubular magazine that is contained in a lever-action firearm.

(x)(1) It shall be unlawful for a person to sell, deliver, or otherwise transfer to a person who the transferor knows or has reasonable cause to believe is a juvenile—
(A) a handgun; or
(B) ammunition that is suitable for use only in a handgun.
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(5) For purposes of this subsection, the term "juvenile" means a person who is less than 18 years of age.

Small Arms Ammunition: Ammunition is classified as a Division 1.1, 1.2, 1.3, or 1.4 explosive, depending on the degree of hazard. Ammunition that is regulated as a Class 1 explosive and designed to be fired from a pistol, revolver, rifle, or shotgun, as well as associated primers and blank cartridges (including those designed for tools) and propellant powder for use in any firearm, is prohibited from mailing.
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Shotgun Hulls, Empty Casings, Nonmetallic Shotgun Hulls, or Casings Without Primers: These articles are not classified as explosives or hazardous materials under 49 CFR and, therefore, are mailable, subject to the applicable mailing rules (refer to 224).