HB 2320
In force since March 24, 2026.
Last reviewed 2026-08-27
Enacted as Engrossed Substitute House Bill 2320, HB 2320 was signed by Governor Bob Ferguson on March 24, 2026 and became Chapter 203, Laws of 2026. It took effect immediately on signing through an emergency clause, except for Section 3, which takes effect on June 30, 2027. The primary sponsor was Representative Osman Salahuddin.
The law amends Washington's firearms statutes — RCW 9.41.010, 9.41.190, 9.41.325, 9.41.326 and 9.41.327 — to expressly cover the use of 3D printers, CNC milling machines and digital firearm manufacturing code. It reaches the act of manufacturing and the distribution and intentional possession of the files, but it does not ban the sale or ownership of the printers or CNC machines themselves.
A separate, more far-reaching bill, HB 2321, did not pass. It would have required 3D printers sold or transferred in Washington to include firearm-blueprint detection and blocking features, with compliance verified by the Attorney General's office. It may be reintroduced in revised form in a future session.
Prohibits manufacturing — including by 3D printer or CNC milling machine — any machine gun, bump-fire stock, undetectable firearm, short-barreled shotgun or short-barreled rifle, or any part designed solely for those weapons or for a machine gun conversion device; manufacturing an untraceable firearm with intent to sell it is also barred. This tier is a Class C felony.
Prohibits manufacturing or assembling an untraceable firearm, including by 3D printer or CNC milling machine. A first violation is a civil infraction, a second a misdemeanour, and a third or subsequent a gross misdemeanour.
Makes it a gross misdemeanour to knowingly or recklessly aid or abet the manufacture of an undetectable or untraceable firearm by a prohibited person, including by distributing digital firearm manufacturing code.
Prohibits knowingly or recklessly manufacturing a frame or receiver, finished or unfinished, by 3D printer or CNC milling machine, unless the person is a federal firearms manufacturer or a federal dealer repairing existing firearms. Penalties escalate from civil infraction to gross misdemeanour, each frame or receiver counts as a separate violation, and three or more is a gross misdemeanour.
Prohibits selling, transferring, distributing or offering digital firearm manufacturing code to anyone not federally licensed to manufacture firearms, and prohibits possessing that code with intent to distribute it to an unlicensed person or to manufacture a firearm, frame or receiver. Penalties escalate from civil infraction to gross misdemeanour, with each firearm, frame or receiver a separate violation.
Amends RCW 9.41.326, which covers undetectable and untraceable firearms, as part of this same enacted package rather than leaving it as separate prior law.
The Legislature adjourned sine die on March 12, 2026 and does not reconvene until January 2027. Pre-session, now through December when prefiling opens, is when members decide what to introduce.
Call or email your three district legislators asking them to introduce or support a repeal or amendment of HB 2320 when the session opens.
Legislative hotline 1-800-562-6000 (TTY 1-800-833-6388); look up and email your members at app.leg.wa.gov/districtfinder.
The Governor's and Attorney General's offices operate between sessions and handle implementation and enforcement of the enacted law.
Submit your position to the Governor through the contact form, and a comment or question on the law or its enforcement to the Attorney General.
governor.wa.gov/contact; Washington State Attorney General's Office, atg.wa.gov.
Filing an initiative to repeal or rewrite the law is available year-round and is not tied to the legislative session calendar.
File a proposed initiative measure with the Secretary of State to start a measure.
Washington Secretary of State, sos.wa.gov/elections/initiatives-referenda.
HB 2320 is in force; HB 2321, the printer-scanning bill, did not pass but may return in revised form in the 2027 session.
Follow regulatory releases now, and once the session opens watch for a reintroduced printer bill and its committee hearings as the window to submit testimony.
Washington State Attorney General's Office (atg.wa.gov); Washington State Legislature Member Directory (leg.wa.gov).