Assembly Bill 321
Prohibition against undetectable firearms, possessing a frame or receiver of a firearm without a serial number, and providing a penalty
Topics: Crime and criminals, Firearms and dangerous weapons, Industrial development, Legislature: Criminal Penalties, Joint Review Committee on
Stopped in committee
It never got a , so it never came up for a vote. The last day for votes this session was Mar 19, 2026. To try again, a lawmaker would have to start a new bill.
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Introduced, passed
Jul 8, 2025
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Committee, stopped here
Stopped here. No public hearing was held.
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Assembly vote, not reached
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Senate vote, not reached
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Governor, not reached
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Law, not reached
Latest entry in the official record, Mar 23, 2026: “Failed to pass pursuant to ”
It never got a hearing in the Assembly Committee on Criminal Justice and Public Safety. The committee's chair at the time was John Spiros. Chairs decide which bills get a hearing. See every bill that never got a hearing this session.
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The same bill was also filed in the Senate as SB 332. That version died when the session ended.
Terms on this page
Committee
A small group of lawmakers that looks at a bill first. Most bills never leave committee.
Public hearing
A meeting where anyone can speak to a committee about a bill, or send written comments.
Senate Joint Resolution 1
The session's calendar. Any bill not passed by its last voting day dies.
Official term: Failed to pass pursuant to SJR 1. More in the glossary
Legislative Reference Bureau
The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.
Official term: LRB analysis. More in the glossary
Author
A lawmaker who formally puts a bill forward. The text itself is drafted by the Legislative Reference Bureau.
Official term: Author, coauthor. More in the glossary
Signed on in support
Lawmakers who back a bill without being one of its authors, often from the other chamber.
Official term: Cosponsor. More in the glossary
What it would have done
Summary by the , the Legislature's nonpartisan drafting office. It's their wording, not ours.
This bill prohibits the manufacture, transportation, sale, possession, and carrying of firearms that cannot be detected by metal detectors or airport x-ray machines or scanners. Federal law currently has a comparable prohibition; under this bill, the person would violate state law as well. A person who violates the state prohibition is guilty of a Class G felony.
This bill also prohibits the sale, posting, provision, or possession of plans for manufacturing an undetectable firearm. A person who violates this prohibition is guilty of a Class H felony.
Read the full summary Show less
Finally, the bill prohibits the possession of a frame or a receiver of a firearm that is not marked with a serial number. A person who violates this prohibition is guilty of a Class I felony.
Because this bill creates a new crime or revises a penalty for an existing crime, the Joint Review Committee on Criminal Penalties may be requested to prepare a report.
Who's behind it
34 representatives are its . All 34 are Democrats.
15 more lawmakers .
See all 49 names Hide the names
Authors (34)
- Deb Andraca · Democrat, Assembly
- Margaret Arney · Democrat, Assembly
- Mike Bare · Democrat, Assembly
- Brienne Brown · Democrat, Assembly
- Ryan Clancy · Democrat, Assembly
- Angelina Cruz · Democrat, Assembly
- Ben DeSmidt · Democrat, Assembly
- Jodi Emerson · Democrat, Assembly
- Joan Fitzgerald · Democrat, Assembly
- Russell Goodwin · Democrat, Assembly
- Kalan Haywood · Democrat, Assembly
- Francesca Hong · Democrat, Assembly
- Andrew Hysell · Democrat, Assembly
- Alex Joers · Democrat, Assembly
- Tara Johnson · Democrat, Assembly
- Karen Kirsch · Democrat, Assembly
- Renuka Mayadev · Democrat, Assembly
- Vinnie Miresse · Democrat, Assembly
- Supreme Moore Omokunde · Democrat, Assembly
- Greta Neubauer · Democrat, Assembly
- Lori Palmeri · Democrat, Assembly
- Priscilla Prado · Democrat, Assembly
- Amaad Rivera-Wagner · Democrat, Assembly
- Ann Roe · Democrat, Assembly
- Joe Sheehan · Democrat, Assembly
- Christine Sinicki · Democrat, Assembly
- Lee Snodgrass · Democrat, Assembly
- Angela Stroud · Democrat, Assembly
- Shelia Stubbs · Democrat, Assembly
- Lisa Subeck · Democrat, Assembly
- Sequanna Taylor · Democrat, Assembly
- Angelito Tenorio · Democrat, Assembly
- Randy Udell · Democrat, Assembly
- Robyn Vining · Democrat, Assembly
Signed on in support (15)
- Jill Billings · Democrat, Assembly
- Tim Carpenter · Democrat, Senate
- Kristin Dassler-Alfheim · Democrat, Senate
- Dora Drake · Democrat, Senate
- Jodi Habush Sinykin · Democrat, Senate
- Dianne Hesselbein · Democrat, Senate
- Jenna Jacobson · Democrat, Assembly
- Sarah Keyeski · Democrat, Senate
- LaTonya Johnson · Democrat, Senate
- Chris Larson · Democrat, Senate
- Maureen McCarville · Democrat, Assembly
- Melissa Ratcliff · Democrat, Senate
- Kelda Roys · Democrat, Senate
- Jeff Smith · Democrat, Senate
- Mark Spreitzer · Democrat, Senate
What happened
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Mar 23, 2026
The session ended, and the bill died with it.
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Sep 10, 2025 to Jan 8, 2026
3 more representatives signed on in support.
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Jul 8, 2025
Sent to the Assembly Committee on Criminal Justice and Public Safety.
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Jul 8, 2025
Introduced in the Assembly.
See the official record, word for word Hide the official record
- Jul 8, 2025 · Assembly
Introduced by Representatives Joers, Fitzgerald, Subeck, Hong, Andraca, Stubbs, Vining, Clancy, Arney, Bare, Brown, Cruz, DeSmidt, Emerson, Goodwin, Hysell, Haywood, Johnson, Kirsch, Mayadev, Miresse, Moore Omokunde, Neubauer, Palmeri, Prado, Rivera-Wagner, Roe, Sheehan, Sinicki, Snodgrass, Stroud, Taylor, Tenorio and Udell; cosponsored by Senators Hesselbein, L. Johnson, Larson, Roys, Dassler-Alfheim, Drake, Habush Sinykin, Keyeski, Ratcliff, Smith, Spreitzer and Carpenter
- Jul 8, 2025 · Assembly
Read first time and referred to Committee on Criminal Justice and Public Safety
- Sep 10, 2025 · Assembly
Representative Billings added as a coauthor
- Sep 23, 2025 · Assembly
Representative McCarville added as a coauthor
- Jan 8, 2026 · Assembly
Representative J. Jacobson added as a coauthor
- Mar 23, 2026 · Assembly
Failed to pass pursuant to Senate Joint Resolution 1
Terms on this page
Committee
A small group of lawmakers that looks at a bill first. Most bills never leave committee.
Public hearing
A meeting where anyone can speak to a committee about a bill, or send written comments.
Senate Joint Resolution 1
The session's calendar. Any bill not passed by its last voting day dies.
Official term: Failed to pass pursuant to SJR 1. More in the glossary
Legislative Reference Bureau
The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.
Official term: LRB analysis. More in the glossary
Author
A lawmaker who formally puts a bill forward. The text itself is drafted by the Legislative Reference Bureau.
Official term: Author, coauthor. More in the glossary
Signed on in support
Lawmakers who back a bill without being one of its authors, often from the other chamber.
Official term: Cosponsor. More in the glossary
From the Wisconsin Legislature's official record, checked Sep 15, 2026. See the source
Committee
A small group of lawmakers that looks at a bill first. Most bills never leave committee.
Public hearing
A meeting where anyone can speak to a committee about a bill, or send written comments.
Senate Joint Resolution 1
The session's calendar. Any bill not passed by its last voting day dies.
Official term: Failed to pass pursuant to SJR 1
Legislative Reference Bureau
The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.
Official term: LRB analysis
Signed on in support
Lawmakers who back a bill without being one of its authors, often from the other chamber.
Official term: Cosponsor