Wash. Rev. Code » Title 9 · Chapter 9.41
Revised Code of Washington

Wash. Rev. Code § 9.41.370 (2026)

✓ current as of May 2026
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(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.]

Notes:

Findings—Intent—Effective date—2022 c 104: See notes following RCW 9.41.010.
Notes of Decisions
Cited in 4 cases (4 in the last 5 years), 2022–2025 · leading case: United States v. Trumbull, 114 F.4th 1114 (9th Cir. 2024).
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United States v. Trumbull, 114 F.4th 1114 (9th Cir. 2024). “13, § 4021 ; Wash. Rev. Code § 9.41.370 . 4 Colo. Rev.”
State v. Gator's Custom Guns, Inc., 568 P.3d 278 (Wash. 2025). · cites it 3× “RCW 9.41.370(1). LCMs are defined as “ammunition feeding device[s] with the capacity [capable] to accept more than 10 rounds of ammunition.”
Brumback v. Ferguson (E.D. Wash. 2023). · cites it 3× “41 12 to add a new section that provides, “[n]o person in this state may manufacture, 13 import, distribute, sell, or offer for sale any large capacity magazine, except as 14 authorized in this section.”
Sullivan v. Ferguson (W.D. Wash. 2022). · cites it 2× “” 5 Wash. Rev. Code § 9.41.370 (1). Large capacity magazines are defined as “an ammunition 6 feeding device with the capacity to accept more than 10 rounds of ammunition,” with certain 7 enumerated exceptions.”
— Wash. Rev. Code § 9.41.370(1) — 2 cases
State v. Gator's Custom Guns, Inc., 568 P.3d 278 (Wash. 2025). “RCW 9.41.370(1). LCMs are defined as “ammunition feeding device[s] with the capacity [capable] to accept more than 10 rounds of ammunition.”
Brumback v. Ferguson (E.D. Wash. 2023). “41 12 to add a new section that provides, “[n]o person in this state may manufacture, 13 import, distribute, sell, or offer for sale any large capacity magazine, except as 14 authorized in this section.”
— Wash. Rev. Code § 9.41.370(2) — 1 case
Brumback v. Ferguson (E.D. Wash. 2023). “41 12 to add a new section that provides, “[n]o person in this state may manufacture, 13 import, distribute, sell, or offer for sale any large capacity magazine, except as 14 authorized in this section.”
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