HB26-1144 • 2026

Prohibit Three-Dimensional Printing Firearms & Components

The bill defines 3-dimensional printing to mean additive and subtractive manufacturing. The bill prohibits each of the following: Knowingly manufacturing or producing a firearm, unfinished frame or re

Crime Education Firearms

Passed Legislature

This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.

Sponsor: Rep. A. Boesenecker, Rep. L. Gilchrist, Sen. T. Sullivan, Sen. K. Wallace, Rep. J. Bacon, Rep. K. Brown, Rep. S. Camacho, Rep. M. Carter, Rep. C. Espenoza, Rep. M. Froelich, Rep. L. Goldstein, Rep. E. Hamrick, Rep. J. Jackson, Rep. J. Joseph, Rep. M. Lindsay, Rep. J. McCluskie, Rep. K. McCormick, Rep. K. Nguyen, Rep. M. Rutinel, Rep. G. Rydin, Rep. E. Sirota, Rep. L. Smith, Rep. R. Stewart, Rep. J. Willford, Rep. S. Woodrow, Rep. Y. Zokaie, Sen. J. Amabile, Sen. A. Benavidez, Sen. J. Coleman, Sen. L. Cutter, Sen. J. Danielson, Sen. L. Daugherty, Sen. J. Gonzales, Sen. I. Jodeh, Sen. C. Kipp, Sen. C. Kolker, Sen. W. Lindstedt, Sen. M. Weissman
Last action: 2026-04-02
Official status: House Considered Senate Amendments - Result was to Concur - Repass
Effective date: Not listed

Plain English Breakdown

Using official source text because the generated explanation was unavailable or could not be confirmed against the official bill text.

Prohibit Three-Dimensional Printing Firearms & Components

The bill defines 3-dimensional printing to mean additive and subtractive manufacturing.

What This Bill Does

The bill defines 3-dimensional printing to mean additive and subtractive manufacturing.
The bill prohibits each of the following: Knowingly manufacturing or producing a firearm, unfinished frame or receiver, large-capacity magazine, or rapid-fire device (firearm or firearm component) by 3-dimensional printing.
The prohibition does not apply to a federally licensed firearm manufacturer , an instructor or student of an accredited gunsmithing program, or an institution that operates an accredited gunsmithing program.
Unlawful three-dimensional printing of a firearm or firearm component is a class 1 misdemeanor; except that a second or subsequent offense is a class 5 felony.

Limits and Unknowns

This entry is temporarily using official source text because the generated explanation could not be confirmed against the official bill text during the last sync.

Amendments

These notes stay tied to the official amendment files and metadata from the legislature.

H.001

Committee of the Whole

Lost

Plain English: AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.001 DATE 2/27/2026 Representative Bottoms moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in not adopting the following Bottoms amendment, (L.033) to HB26-1144, to show that said amendment passed and that HB26-1144, as amended, passed.

AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.001 DATE 2/27/2026 Representative Bottoms moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in not adopting the following Bottoms amendment, (L.033) to HB26-1144, to show that said amendment passed and that HB26-1144, as amended, passed.
Amend printed bill, page 4, strike lines 26 and 27 and substitute: "SECTION 2.
Nonseverability.
If any provision of this act is held invalid, such invalidity invalidates this act in its entirety, and to this end the provisions of this act are declared to be nonseverable.".

H.003

Committee of the Whole

Lost

Plain English: AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.003 DATE 2/27/2026 Representative Flanell moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in not adopting the following Flanell amendment, (L.006) to HB26-1144, to show that said amendment passed and that HB26-1144, as amended, passed.

AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.003 DATE 2/27/2026 Representative Flanell moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in not adopting the following Flanell amendment, (L.006) to HB26-1144, to show that said amendment passed and that HB26-1144, as amended, passed.
Amend printed bill, page 2, line 7, after "penalties -" insert "notice to the revisor of statutes -".
Page 4, after line 25, add: "(5) (a) THE COLORADO BUREAU OF INVESTIGATION SHALL STUDY WHETHER THREE-DIMENSIONALLY PRINTED FIREARMS ARE STATISTICALLY RESPONSIBLE FOR A MEASURABLE PERCENTAGE OF GUN CRIMES IN COLORADO.
THE BUREAU SHALL COMPLETE THE STUDY ON OR BEFORE DECEMBER 31, 2026.

H.004

Committee of the Whole

Lost

Plain English: AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.004 DATE 2/27/2026 Representative Brooks moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in not adopting the following Soper amendment, (L.024) to HB26-1144, to show that said amendment passed and that HB26-1144, as amended, passed.

AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.004 DATE 2/27/2026 Representative Brooks moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in not adopting the following Soper amendment, (L.024) to HB26-1144, to show that said amendment passed and that HB26-1144, as amended, passed.
Amend printed bill, page 3, line 1 strike "CLASS 1 MISDEMEANOR;" and substitute "CLASS 2 MISDEMEANOR;".
Page 3, line 2, strike "CLASS 5 FELONY." and substitute "CLASS 6 FELONY.".
** *** ** *** **

H.005

Committee of the Whole

Lost

Plain English: AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.005 DATE 2/27/2026 Representative Barron moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in adopting HB26-1144 to show that HB26-1144, as amended, lost.

AMENDMENT TO REPORT OF THE COMMITTEE OF THE WHOLE HB1144_H.005 DATE 2/27/2026 Representative Barron moved to amend the Report of the Committee of the Whole to reverse the action taken by the Committee in adopting HB26-1144 to show that HB26-1144, as amended, lost.

L.001

HOU Judiciary

Passed [*]

Plain English: HB1144_L.001 HOUSE COMMITTEE OF REFERENCE AMENDMENT Committee on Judiciary.

HB1144_L.001 HOUSE COMMITTEE OF REFERENCE AMENDMENT Committee on Judiciary.
HB26-1144 be amended as follows: 1 Amend printed bill, page 2, line 8, before "MANUFACTURE" insert 2 "KNOWINGLY".
3 Page 3, line 5, before "POSSESS," insert "KNOWINGLY".
4 Page 3, line 22, before "OFFER" insert "KNOWINGLY".

L.003

Second Reading

Passed [**]

Plain English: HB1144_L.003 Amendment No.

HB1144_L.003 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Boesenecker 1 Amend the Judiciary Committee Report, dated February 18, 2026, before 2 line 1 insert: 3 "Amend printed bill, page 2, lines 5 and 6, strike "possession of firearm 4 or firearm component printing plans -".
5 Page 1 of the report, line 1, strike "Amend printed bill, page" and 6 substitute "Page".
7 Page 1 of the report, strike line 3 and substitute: 8 "Page 3 of the bill, strike lines 5 through 21.

L.004

Second Reading

Passed [**]

Plain English: HB1144_L.004 Amendment No.

HB1144_L.004 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Boesenecker 1 Amend printed bill, page 3, strike lines 3 and 4 and substitute: 2 "(c) THIS SUBSECTION (1) DOES NOT APPLY TO: 3 (I) A FEDERALLY LICENSED FIREARM MANUFACTURER; 4 (II) AN INSTRUCTOR OR STUDENT OF AN ACCREDITED 5 GUNSMITHING PROGRAM, OR AN INSTITUTION THAT OPERATES AN 6 ACCREDITED GUNSMITHING PROGRAM, WHEN THE MANUFACTURE IS 7 SOLELY FOR PURPOSES OF EDUCATIONAL INSTRUCTION WITHIN THE 8 ACCREDITED GUNSMITHING PROGRAM.".
9 Page 4, after line 5 insert: 10 "(c) THIS SUBSECTION (2) DOES NOT APPLY TO DISTRIBUTION OF 11 DIGITAL INSTRUCTIONS TO AN INSTRUCTOR OR STUDENT, OR BETWEEN AN 12 INSTRUCTOR AND STUDENT, OF AN ACCREDITED GUNSMITHING PROGRAM, 13 OR AN INSTITUTION THAT OPERATES AN ACCREDITED GUNSMITHING 14 PROGRAM, WHEN THE DISTRIBUTION IS SOLELY FOR PURPOSES OF 15 EDUCATIONAL INSTRUCTION WITHIN THE ACCREDITED GUNSMITHING 16 PROGRAM.".
17 Page 4, after line 17 insert: 18 "(e) "GUNSMITHING PROGRAM" MEANS A GUNSMITHING PROGRAM 19 OPERATED BY AN INSTITUTION.

L.005

Second Reading

Lost [**]

Plain English: HB1144_L.005 Amendment No.

HB1144_L.005 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Flanell 1 Amend printed bill page 3, after line 4, insert: 2 "(d) IT IS NOT AN OFFENSE PURSUANT TO THIS SUBSECTION (1) IF, 3 WITHIN FORTY-EIGHT HOURS AFTER MANUFACTURING A FIREARM, THE 4 PERSON CAUSES A FEDERAL FIREARMS LICENSEE TO SERIALIZE THE 5 FIREARM PURSUANT TO SECTION 18-12-111.5 (7), INCLUDING THE 6 REQUIREMENT THAT THE FEDERAL FIREARMS LICENSEE CONDUCT A 7 BACKGROUND CHECK ON THE TRANSFEREE PRIOR TO RETURNING THE 8 FIREARM.".
** *** ** *** ** LLS: Conrad Imel x2313

L.006

Second Reading

Lost [**]

Plain English: HB1144_L.006 Amendment No.

HB1144_L.006 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Flanell 1 Amend printed bill, page 2, line 7, after "penalties -" insert "notice to the 2 revisor of statutes -".
3 Page 4, after line 25, add: 4 "(5) (a) THE COLORADO BUREAU OF INVESTIGATION SHALL STUDY 5 WHETHER THREE-DIMENSIONALLY PRINTED FIREARMS ARE STATISTICALLY 6 RESPONSIBLE FOR A MEASURABLE PERCENTAGE OF GUN CRIMES IN 7 COLORADO.
THE BUREAU SHALL COMPLETE THE STUDY ON OR BEFORE 8 DECEMBER 31, 2026.

L.008

Second Reading

Lost [**]

Plain English: HB1144_L.008 Amendment No.

HB1144_L.008 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Johnson 1 Amend printed bill, page 2, line 7, after "penalties -" insert "notice to the 2 revisor of statutes -".
3 Page 4, after line 25, add: 4 "(5) SUBSECTIONS (1) TO (3) OF THIS SECTION WILL TAKE EFFECT 5 IF STATES ARE EXPRESSLY AUTHORIZED BY FEDERAL LAW TO PROHIBIT THE 6 DISTRIBUTION AND POSSESSION OF DIGITAL INSTRUCTIONS THAT MAY BE 7 USED TO PROGRAM A THREE-DIMENSIONAL PRINTER OR A CNC MILLING 8 MACHINE TO MANUFACTURE OR PRODUCE A FIREARM OR FIREARM 9 COMPONENT.
THE EXECUTIVE DIRECTOR OF THE DEPARTMENT OF PUBLIC 10 SAFETY SHALL NOTIFY THE REVISOR OF STATUTES IN WRITING OF THE DATE 11 WHEN THE CONDITION SPECIFIED IN THIS SUBSECTION (5) HAS OCCURRED 12 BY EMAILING THE NOTICE TO REVISOROFSTATUTES.GA@COLEG.GOV.

L.009

Second Reading

Lost [**]

Plain English: HB1144_L.009 Amendment No.

HB1144_L.009 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Johnson 1 Amend the Judiciary Committee Report, dated February 18, 2026, page 2 1, strike lines 3 and 4 and substitute: 3 "Page 3 of the bill, strike lines 5 though 27.
4 Renumber succeeding subsection accordingly.
5 Page 4 of the bill, strike lines 1 through 5.

L.011

Second Reading

Lost [**]

Plain English: HB1144_L.011 Amendment No.

HB1144_L.011 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 2, lines 10 and 11, strike "MACHINE, OR SIMILAR 2 DEVICE." and substitute "MACHINE.".
3 Page 4, line 22, strike "OR SIMILAR DEVICE".
4 Page 4, lines 24 and 25, strike "MACHINE OR SIMILAR DEVICE." and 5 substitute "MACHINE.".

L.012

Second Reading

Lost [**]

Plain English: HB1144_L.012 Amendment No.

HB1144_L.012 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 4, after line 19 insert: 2 "(f) "SIMILAR DEVICE" MEANS A DEVICE FUNCTIONALLY 3 EQUIVALENT TO A THREE-DIMENSIONAL PRINTER OR CNC MILLING 4 MACHINE, AS APPLICABLE, THAT IS COMPUTER-CONTROLLED AND CAPABLE 5 OF PRODUCING A FRAME OR RECEIVER OF A FIREARM TO FUNCTIONAL 6 TOLERANCES.".
7 Reletter succeeding paragraph accordingly.
** *** ** *** ** LLS: Conrad Imel x2313

L.013

Second Reading

Lost [**]

Plain English: HB1144_L.013 Amendment No.

HB1144_L.013 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 4, after line 5 insert: 2 "(4) THIS SECTION DOES NOT PROHIBIT THE MANUFACTURE OF, OR 3 DISTRIBUTION OF, DIGITAL INSTRUCTIONS THAT MAY BE USED TO PROGRAM 4 A THREE-DIMENSIONAL PRINTER OR A CNC MILLING MACHINE TO 5 MANUFACTURE OR PRODUCE A NONFUNCTIONING FIREARM THAT LACKS A 6 BARREL, RECEIVER, OR FIRING PIN, AND THE PURPOSE OF WHICH IS FOR USE 7 IN A THEATRICAL PERFORMANCE, IN ROLE PLAY, OR AS ARTWORK.".
8 Renumber succeeding subsection accordingly.
** *** ** *** ** LLS: Conrad Imel x2313

L.015

Second Reading

Lost [**]

Plain English: HB1144_L.015 Amendment No.

HB1144_L.015 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 2, line 7, strike "definitions." and substitute 2 "study - definitions - repeal.".
3 Page 4, after line 25, insert: 4 "(5) (a) THE DIVISION OF CRIMINAL JUSTICE IN THE DEPARTMENT OF 5 PUBLIC SAFETY SHALL CONDUCT A STUDY ABOUT THE EFFECTS OF THIS 6 SECTION.
AS PART OF THE STUDY, THE DIVISION SHALL COLLECT DATA 7 ABOUT CHARGES BROUGHT AND CONVICTIONS FOR VIOLATIONS PURSUANT 8 TO THIS SECTION; STUDY WHETHER THE SECTION AND CHARGES AND 9 CONVICTIONS THEREUNDER IMPACTED INSTANCES OF VIOLENT CRIME; AND 10 DOCUMENT WHETHER, IN CASES THAT INCLUDED CHARGES BROUGHT 11 PURSUANT TO THIS SECTION, STATE LAW AS IT EXISTED PRIOR TO THE 12 ENACTMENT OF HOUSE BILL 26-1144 WAS INSUFFICIENT TO CONVICT THE 13 DEFENDANT OF A CRIME.

L.016

Second Reading

Lost [**]

Plain English: HB1144_L.016 Amendment No.

HB1144_L.016 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 4, after line 5, insert: 2 "(4) IT IS AN AFFIRMATIVE DEFENSE TO A CHARGE OF VIOLATING 3 THIS SECTION THAT THE DEFENDANT'S MANUFACTURE OF A FIREARM OR 4 FIREARM COMPONENT OR POSSESSION OR DISTRIBUTION OF DIGITAL 5 INSTRUCTIONS WAS FOR LAWFUL EDUCATIONAL, RESEARCH, JOURNALISTIC, 6 OR MANUFACTURING COMPLIANCE PURPOSES AND THE DEFENDANT DID 7 NOT INTEND TO UNLAWFULLY MANUFACTURE A FIREARM OR FIREARM 8 COMPONENT OR UNLAWFULLY POSSESS OR DISTRIBUTE DIGITAL 9 INSTRUCTIONS.".
10 Renumber succeeding subsection accordingly.
** *** ** *** ** LLS: Conrad Imel x2313

L.019

Second Reading

Lost [**]

Plain English: HB1144_L.019 Amendment No.

HB1144_L.019 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 4, strike line 17 and substitute "RECEIVER.".
** *** ** *** ** LLS: Conrad Imel x2313

L.023

Second Reading

Passed [**]

Plain English: HB1144_L.023 Amendment No.

HB1144_L.023 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Boesenecker 1 Amend printed bill, page 4, after line 5, insert: 2 "(4) THIS SECTION ONLY APPLIES TO POTENTIALLY FUNCTIONAL 3 FIREARMS AND FIREARM COMPONENTS AND DOES NOT APPLY TO THE 4 THREE-DIMENSIONAL PRINTING OF ANY OTHER COMPONENTS OR 5 COMPONENTS THAT COULD BE USED TO MAKE A NON-FUNCTIONING OR 6 PROP FIREARM.".
7 Renumber succeeding subsection accordingly.
** *** ** *** ** LLS: Conrad Imel x2313

L.024

Second Reading

Lost [**]

Plain English: HB1144_L.024 Amendment No.

HB1144_L.024 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 3, line 1 strike "CLASS 1 MISDEMEANOR;" and 2 substitute "CLASS 2 MISDEMEANOR;".
3 Page 3, line 2, strike "CLASS 5 FELONY." and substitute "CLASS 6 4 FELONY.".
** *** ** *** ** LLS: Conrad Imel x2313

L.025

Second Reading

Lost [**]

Plain English: HB1144_L.025 Amendment No.

HB1144_L.025 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend the Judiciary Committee Report, dated February 18, 2026, before 2 line 1 insert: 3 "Amend printed bill, page 2, lines 5 and 6, strike "possession of firearm 4 or firearm component printing plans -".
5 Page 1 of the report, line 1, strike "Amend printed bill, page" and 6 substitute "Page".
7 Page 1 of the report, strike line 3 and substitute: 8 "Page 2 of the bill, strike lines 12 through 14.

L.027

Second Reading

Lost [**]

Plain English: HB1144_L.027 Amendment No.

HB1144_L.027 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 2, line 8, after "PERSON" insert "WHO IS 2 PROHIBITED FROM POSSESSING A FIREARM PURSUANT TO SECTION 3 18-12-108 OR FEDERAL LAW".
4 Page 3, line 22, after "PERSON" insert "WHO IS PROHIBITED FROM 5 POSSESSING A FIREARM PURSUANT TO SECTION 18-12-108 OR FEDERAL 6 LAW".
** *** ** *** ** LLS: Conrad Imel x2313

L.029

Second Reading

Lost [**]

Plain English: HB1144_L.029 Amendment No.

HB1144_L.029 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Richardson 1 Amend printed bill, page 3, line 25, strike "THAT MAY BE USED" and 2 substitute "PRIMARILY DESIGNED TO BE USED, AND INTENDED BY THE 3 PERSON TO BE USED".
** *** ** *** ** LLS: Conrad Imel x2313

L.032

Second Reading

Lost [**]

Plain English: HB1144_L.032 Amendment No.

HB1144_L.032 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Keltie 1 Amend printed bill, page 2, lines 13 and 14, strike "FIREARM OR FIREARM 2 COMPONENT." and substitute "FIREARM.".
** *** ** *** ** LLS: Conrad Imel x2313

L.033

Second Reading

Lost [**]

Plain English: HB1144_L.033 Amendment No.

HB1144_L.033 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Bottoms 1 Amend printed bill, page 4, strike lines 26 and 27 and substitute: 2 "SECTION 2.
Nonseverability.
If any provision of this act is 3 held invalid, such invalidity invalidates this act in its entirety, and to this 4 end the provisions of this act are declared to be nonseverable.".

L.034

Second Reading

Lost [**]

Plain English: HB1144_L.034 Amendment No.

HB1144_L.034 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Soper 1 Amend the Boesenecker floor amendment (HB1144_L.023), page 1, line 2 2, strike "POTENTIALLY FUNCTIONAL".
** *** ** *** ** LLS: Conrad Imel x2313

L.036

Second Reading

Lost [**]

Plain English: HB1144_L.036 Amendment No.

HB1144_L.036 Amendment No.
___________ HB26-1144 HOUSE FLOOR AMENDMENT Second Reading BY REPRESENTATIVE Bottoms 1 Amend printed bill, page 5, strike lines 4 through 10, and substitute: 2 "SECTION 3.
Act subject to petition - effective date - 3 applicability.
(1) This act takes effect at 12:01 a.m.

L.039

Second Reading

Lost [**]

Plain English: HB1144_L.039 Amendment No.

HB1144_L.039 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 5, strike lines 6 through 10 and substitute: 2 "SECTION 2.
Nonseverability.
If any provision of this act is 3 held invalid, such invalidity invalidates this act in its entirety, and to this 4 end the provisions of this act are declared to be nonseverable.".

L.040

Second Reading

Lost [**]

Plain English: HB1144_L.040 Amendment No.

HB1144_L.040 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 5, strike lines 11 through 17, and substitute: 2 "SECTION 3.
Act subject to petition - effective date - 3 applicability.
(1) This act takes effect at 12:01 a.m.

L.045

Second Reading

Lost [**]

Plain English: HB1144_L.045 Amendment No.

HB1144_L.045 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 2, line 5, strike "or firearm component".
2 Page 2, line 8, strike "OR FIREARM COMPONENT".
3 Page 2, lines 12 and 13, strike "FIREARM OR FIREARM COMPONENT." and 4 substitute "FIREARM.".

L.047

Second Reading

Lost [**]

Plain English: HB1144_L.047 Amendment No.

HB1144_L.047 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 5, line 12, strike "July 1, 2026," and 2 substitute "July 1, 2031,".
** *** ** *** ** LLS: Conrad Imel x2313

L.050

Second Reading

Lost [**]

Plain English: HB1144_L.050 Amendment No.

HB1144_L.050 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 3, line 27, after "(3)" insert "(a)".
2 Page 4, after line 4 insert: 3 "(b) THIS SECTION DOES NOT APPLY TO A PEACE OFFICER OR TO A 4 FORMER PEACE OFFICER WHO HAS NOT BEEN CONVICTED OF A FELONY.".
** *** ** *** ** LLS: Conrad Imel x2313

L.051

Second Reading

Lost [**]

Plain English: HB1144_L.051 Amendment No.

HB1144_L.051 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 3, line 27, after "(3)" insert "(a)".
2 Page 4, after line 4 insert: 3 "(b) THIS SECTION DOES NOT APPLY TO: 4 (I) A MEMBER OF THE UNITED STATES ARMED FORCES OR 5 COLORADO NATIONAL GUARD; OR 6 (II) AN HONORABLY DISCHARGED VETERAN OF THE UNITED 7 STATES ARMED FORCES OR COLORADO NATIONAL GUARD WHO HAS NOT 8 BEEN CONVICTED OF A FELONY.".
** *** ** *** ** LLS: Conrad Imel x2313

L.052

Second Reading

Passed [**]

Plain English: HB1144_L.052 Amendment No.

HB1144_L.052 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Wallace 1 Amend reengrossed bill, page 2, lines 5 and 6, strike "distribution of 2 firearm or firearm component printing plans -".
3 Page 3, strike lines 10 through 26.
4 Renumber succeeding subsections accordingly.

L.053

Second Reading

Lost [**]

Plain English: HB1144_L.053 Amendment No.

HB1144_L.053 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 4, after line 4 insert: 2 "(4) IT IS AN AFFIRMATIVE DEFENSE TO A CHARGE OF VIOLATING 3 THIS SECTION THAT THE DEFENDANT'S MANUFACTURE OF A FIREARM OR 4 FIREARM COMPONENT WAS FOR LAWFUL EDUCATIONAL, RESEARCH, 5 JOURNALISTIC, OR MANUFACTURING COMPLIANCE PURPOSES.".
6 Renumber succeeding subsection accordingly.
** *** ** *** ** LLS: Conrad Imel x2313

L.054

Second Reading

Lost [**]

Plain English: HB1144_L.054 Amendment No.

HB1144_L.054 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 2, line 7, after "PERSON" insert "WHO IS 2 PROHIBITED FROM POSSESSING A FIREARM PURSUANT TO SECTION 3 18-12-108 OR FEDERAL LAW".
** *** ** *** ** LLS: Conrad Imel x2313

L.055

Second Reading

Lost [**]

Plain English: HB1144_L.055 Amendment No.

HB1144_L.055 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Simpson 1 Amend reengrossed bill, page 3, line 8, strike "PROGRAM." and substitute 2 "PROGRAM; AND 3 (III) A GRADUATE OF AN ACCREDITED GUNSMITHING PROGRAM.".
** *** ** *** ** LLS: Conrad Imel x2313

L.056

Second Reading

Lost [**]

Plain English: HB1144_L.056 Amendment No.

HB1144_L.056 Amendment No.
___________ HB26-1144 SENATE FLOOR AMENDMENT Second Reading BY SENATOR Bright 1 Amend reengrossed bill, page 3, line 8, strike "PROGRAM." and substitute 2 "PROGRAM; AND 3 (III) THE MANUFACTURE, BY A PERSON WITH A DISABILITY, OF AN 4 ADAPTIVE COMPONENT SOLELY TO ACCOMMODATE THE PERSON'S 5 DISABILITY SO LONG AS THE COMPONENT DOES NOT CONVERT A LEGAL 6 FIREARM INTO A CONFIGURATION THAT VIOLATES STATE OR FEDERAL 7 LAW.".
** *** ** *** ** LLS: Conrad Imel x2313

Bill History

2026-04-02 House
House Considered Senate Amendments - Result was to Concur - Repass
2026-03-31 House
House Considered Senate Amendments - Result was to Laid Over Daily
2026-03-30 Senate
Senate Third Reading Reconsidered - No Amendments
2026-03-30 Senate
Senate Third Reading Passed - No Amendments
2026-03-27 Senate
Senate Second Reading Passed with Amendments - Floor
2026-03-26 Senate
Senate Second Reading Laid Over to 03/27/2026 - No Amendments
2026-03-25 Senate
Senate Second Reading Laid Over to 03/26/2026 - No Amendments
2026-03-24 Senate
Senate Second Reading Laid Over to 03/25/2026 - No Amendments
2026-03-19 Senate
Senate Committee on State, Veterans, & Military Affairs Refer Unamended to Senate Committee of the Whole
2026-03-05 Senate
Introduced In Senate - Assigned to State, Veterans, & Military Affairs
2026-03-02 House
House Third Reading Passed - No Amendments
2026-02-27 House
House Second Reading Special Order - Passed with Amendments - Committee, Floor
2026-02-23 House
House Second Reading Laid Over Daily - No Amendments
2026-02-18 House
House Committee on Judiciary Refer Amended to House Committee of the Whole
2026-02-04 House
Introduced In House - Assigned to Judiciary

Official Summary Text

The bill defines 3-dimensional printing to mean additive and subtractive manufacturing. The bill prohibits each of the following:

Knowingly
manufacturing or producing a firearm, unfinished frame or receiver, large-capacity magazine, or rapid-fire device (firearm or firearm component) by 3-dimensional printing. The prohibition does not apply to a federally licensed firearm manufacturer
, an instructor or student of an accredited gunsmithing program, or an institution that operates an accredited gunsmithing program. Unlawful three-dimensional printing of a firearm or firearm component is a class 1 misdemeanor; except that a second or subsequent offense is a class 5 felony.

Possessing, in circumstances that indicate intent to manufacture a firearm or firearm component in violation of state law or intent to distribute, digital instructions that may be used to program a 3-dimensional printer or a computer numerical control (CNC) milling machine to manufacture or produce a firearm or firearm component. The prohibition does not apply to a federally licensed firearm manufacturer who possesses digital instructions in circumstances that indicate intent to manufacture a firearm or firearm component.

Knowingly offering to sell or
distributing digital instructions that may be used
to program a 3-dimensional printer or CNC milling machine to manufacture or produce a firearm or firearm component.

for an activity that constitutes a violation of specified existing state law concerning unlawful conduct involving an unserialized firearm, frame, or receiver. The prohibition does not apply to distribution of digital instructions to or between an instructor and student of an accredited gunsmithing program, or an institution that operates an accredited gunsmithing program, when the distribution is solely for educational instruction. Unlawful distribution of digital firearms production instructions is a civil infraction.

The prohibitions in the bill only apply to potentially functional firearms and firearm components.

The bill does not prohibit possession of digital instructions in circumstances that indicate intent to distribute to, or distributing digital instructions to, a federally licensed firearm manufacturer.

A violation of any of the prohibitions in the bill is a class 1 misdemeanor; except that a second or subsequent offense is a class 5 felony.
(Note: Italicized words indicate new material added to the original summary; dashes through words indicate deletions from the original summary.)
(Note: This summary applies to the reengrossed version of this bill as introduced in the second house.)

Current Bill Text

Read the full stored bill text

HOUSE BILL 26-1144
BY REPRESENTATIVE(S) Gilchrist and Boesenecker, Bacon, Brown,
Camacho, Carter, Espenoza, Froelich, Goldstein, Hamrick, Jackson, Joseph,
Lindsay, McCormick, Nguyen, Rutinel, Rydin, Sirota, Smith, Stewart R.,
Willford, Woodrow, Zokaie, McCluskie;
also SENATOR(S) Sullivan and Wallace, Amabile, Benavidez, Cutter,
Danielson, Daugherty, Gonzales J., Jodeh, Ki pp, Kolk er, Lindstedt,
Weissman, Coleman.
CONCERNING MEASURES TO PROHIBIT THE USE OF THREE -DIMENSIONAL
PRINTING TO MANUFACTURE FIREARMS.

Be it enacted by the General Assembly of the State of Colorado:
SECTION 1. In Colorado Revised Statutes, add 18-12-119 as
follows:
18-12-119. Unlawful three-dimensional printing of a firearm or
firearm component - penalties - definitions.
(1) (a) A PERSON SHALL NOT KNOWINGLY M ANUFACTURE OR
PRODUCE A FIREARM OR FIREARM COMPONENT BY MEANS OF
THREE-DIMENSIONAL PRINTING USING A THREE-DIMENSIONAL PRINTER, CNC
NOTE: This bill has been prepared for the signatures of the appropriate legislative
officers and the Governor. To determine whether the Governor has signed the bill
or taken other action on it, please consult the legislative status sheet, the legislative
history, or the Session Laws.
________
Capital letters or bold & italic numbers indicate new material added to existing law; dashes
through words or numbers indicate deletions from existing law and such material is not part of
the act.
MILLING MACHINE, OR SIMILAR DEVICE.
(b) A PERSON WHO VIOLATES THIS SUBSECTION (1) COMMITS
UNLAWFUL THREE -DIMENSIONAL PRINTING OF A FIREARM OR FIREARM
COMPONENT. UNLAWFUL THREE-DIMENSIONAL PRINTING OF A FIREARM OR
FIREARM COMPONENT IS A CLASS 1 MISDEMEANOR; EXCEPT THAT A SECOND
OR SUBSEQUENT OFFENSE IS A CLASS 5 FELONY.
(c) THIS SUBSECTION (1) DOES NOT APPLY TO:
(I) A FEDERALLY LICENSED FIREARM MANUFACTURER;
(II) AN INSTRUCTOR OR STUDENT OF AN ACCREDITED GUNSMITHING
PROGRAM, OR AN INSTITUTION THAT OPERATES AN ACCREDITED
GUNSMITHING PROGRAM , WHEN THE MANUFACTURE IS SOLELY FOR
PURPOSES OF EDUCATIONAL INSTRUCTION WITHIN THE ACCREDITED
GUNSMITHING PROGRAM.
(2) T HIS SECTION ONLY APPLIES TO POTENTIALLY FUNCTIONAL
FIREARMS AND FIREARM COMPONENTS AND DOES NOT APPLY TO THE
THREE-DIMENSIONAL PRINTING OF ANY OTHER COMPONENTS OR
COMPONENTS THAT COULD BE USED TO MAKE A NON-FUNCTIONING OR PROP
FIREARM.
(3) A S USED IN THIS SECTION , UNLESS THE CONTEXT OTHERWISE
REQUIRES:
(a) "CNC MILLING MACHINE " MEANS A COMPUTER NUMERICAL
CONTROL MILLING MACHINE.
(b) "F IREARM COMPONENT " MEANS AN UNFINISHED FRAME OR
RECEIVER, LARGE-CAPACITY MAGAZINE, OR RAPID-FIRE DEVICE.
(c) "G UNSMITHING PROGRAM" MEANS A GUNSMITHING PROGRAM
OPERATED BY AN INSTITUTION.
(d) "I NSTITUTION" MEANS A STATE -AUTHORIZED INSTITUTION OF
HIGHER EDUCATION OR INSTITUTION REGULATED BY THE COLORADO
DIVISION OF PRIVATE OCCUPATIONAL SCHOOLS.
PAGE 2-HOUSE BILL 26-1144
(e) "L ARGE-CAPACITY MAGAZINE " HAS THE SAME MEANING SET
FORTH IN SECTION 18-12-301.
(f) "T HREE-DIMENSIONAL PRINTING " OR "3-D PRINTING " MEANS
ADDITIVE MANUFACTURING THAT BUILDS THREE-DIMENSIONAL OBJECTS BY
USE OF A THREE -DIMENSIONAL PRINTER OR SIMILAR DEVICE AND
SUBTRACTIVE MANUFACTURING THAT CREATES OBJECTS BY REMOVING
MATERIAL FROM A WORKPIECE BY USE OF A CNC MILLING MACHINE OR
SIMILAR DEVICE.
SECTION 2. Severability. If any provision of this act or the
application of this act to any person or circumstance is held invalid, the
invalidity does not affect other provisions or applications of the act that can
be given effect without the invalid provision or application, and to this end
the provisions of this act are declared to be severable.
SECTION 3. Effective date - applicability. This act takes effect
July 1, 2026, and applies to offenses committed on or after said date.
SECTION 4. Safety clause. The general assembly finds,
determines, and declares that this act is necessary for the immediate
preservation of the public peace, health, or safety or for appropriations for
PAGE 3-HOUSE BILL 26-1144
the support and maintenance of the departments of the state and state
institutions.
____________________________ ____________________________
Julie McCluskie James Rashad Coleman, Sr.
SPEAKER OF THE HOUSE PRESIDENT OF
OF REPRESENTATIVES THE SENATE
____________________________ ____________________________
Vanessa Reilly Esther van Mourik
CHIEF CLERK OF THE HOUSE SECRETARY OF
OF REPRESENTATIVES THE SENATE
APPROVED________________________________________
(Date and Time)
_________________________________________
Jared S. Polis
GOVERNOR OF THE STATE OF COLORADO
PAGE 4-HOUSE BILL 26-1144