---
type: "Bill"
title: "Requirements for Sale of Firearms Ammunition"
description: "The act requires that ammunition sold at retail must be accessible to a purchaser or transferee only with the assistance of the vendor, and the act prohibits the retail sale of ammunition to a person who is younger than 21 years of age. The act includes exceptions for in-person sales to persons who are 18-20 years of age at shooting ranges, who are members of the military and veterans, who have a hunter education certification, who are protected by a protection order, or who were born on or before January 28, 2007; sales to on-duty peace officers; and sales of rimfire ammunition. Unlawful sale of ammunition by violating either requirement is a civil infraction; except that a second or subsequent violation is a class 1 misdemeanor."
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2025A"
identifier: "HB 25-1133"
citation: "Colorado HB 25-1133 (2025A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Cathy Kipp", "Judy Amabile", "Lindsay Gilchrist", "Monica Duran"]
version_count: 10
action_count: 17
vote_count: 11
first_action: "2025-01-28T07:00:00+00:00"
last_action: "2025-04-18T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/4183ca16-7655-4da5-b294-292a3943a4cb"
source_url: "https://leg.colorado.gov/bills/hb25-1133"
source_hash: "dcc89c255a966cae3c64e34092bc539850ca68f69d94e98ffd9106152cebb5ac"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-co"]
---

# Colorado HB 25-1133 (2025A) — Requirements for Sale of Firearms Ammunition

The act requires that ammunition sold at retail must be accessible to a purchaser or transferee only with the assistance of the vendor, and the act prohibits the retail sale of ammunition to a person who is younger than 21 years of age. The act includes exceptions for in-person sales to persons who are 18-20 years of age at shooting ranges, who are members of the military and veterans, who have a hunter education certification, who are protected by a protection order, or who were born on or before January 28, 2007; sales to on-duty peace officers; and sales of rimfire ammunition. Unlawful sale of ammunition by violating either requirement is a civil infraction; except that a second or subsequent violation is a class 1 misdemeanor.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Committee Amendment** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2025a_hb1133_s_sa_001.pdf)
2. **Engrossed (02/21/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_eng.pdf)
3. **Final Act (04/08/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_enr.pdf)
4. **Introduced (01/28/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_01.pdf)
5. **PA1 (02/14/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_h_bus_01.pdf)
6. **PA2 (03/19/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_s_sa_01.pdf)
7. **Reengrossed (02/25/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_ren.pdf)
8. **Rerevised (03/25/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_rer.pdf)
9. **Revised (03/24/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_1133_rev.pdf)
10. **Signed Act (04/18/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2025a_1133_signed.pdf)

## Votes

- COW * — **13–18** (fail) · upper
- BILL — **38–27** (pass) · lower
- COW * — **13–18** (fail) · upper
- PERM — **56–5** (pass) · lower
- REREFER — **22–39** (fail) · lower
- CONCUR — **43–20** (pass) · lower
- AMD — **22–37** (fail) · lower
- REPASS — **38–25** (pass) · lower
- BILL — **19–16** (pass) · upper
- AMD — **24–35** (fail) · lower
- AMD — **60–1** (pass) · lower

## Sponsors

- Cathy Kipp — primary (person)
- Judy Amabile — primary (person)
- Lindsay Gilchrist — primary (person)
- Monica Duran — primary (person)
- A. Boesenecker — cosponsor (person)
- C. Kolker — cosponsor (person)
- D. Michaelson Jenet — cosponsor (person)
- E. Sirota — cosponsor (person)
- F. Winter — cosponsor (person)
- I. Jodeh — cosponsor (person)
- J. Bacon — cosponsor (person)
- J. Coleman — cosponsor (person)
- J. Danielson — cosponsor (person)
- J. Gonzales — cosponsor (person)
- J. Jackson — cosponsor (person)
- J. Joseph — cosponsor (person)
- J. Mabrey — cosponsor (person)
- K. Brown — cosponsor (person)
- K. Wallace — cosponsor (person)
- L. Cutter — cosponsor (person)
- L. Daugherty — cosponsor (person)
- L. García — cosponsor (person)
- M. Froelich — cosponsor (person)
- M. Lindsay — cosponsor (person)
- M. Rutinel — cosponsor (person)
- M. Weissman — cosponsor (person)
- R. Stewart — cosponsor (person)
- S. Camacho — cosponsor (person)
- S. Woodrow — cosponsor (person)
- T. Story — cosponsor (person)
- T. Sullivan — cosponsor (person)
- W. Lindstedt — cosponsor (person)
- Y. Zokaie — cosponsor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2025-04-18T06:00:00+00:00** Governor Signed `executive-signature`
- **2025-04-08T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2025-04-08T06:00:00+00:00** Signed by the President of the Senate
- **2025-04-07T06:00:00+00:00** Signed by the Speaker of the House
- **2025-03-28T06:00:00+00:00** House Considered Senate Amendments - Result was to Concur - Repass
- **2025-03-26T06:00:00+00:00** House Considered Senate Amendments - Result was to Laid Over Daily
- **2025-03-25T06:00:00+00:00** Senate Third Reading Passed - No Amendments `passage, reading-3`
- **2025-03-24T06:00:00+00:00** Senate Second Reading Passed with Amendments - Committee, Floor `reading-2`
- **2025-03-21T06:00:00+00:00** Senate Second Reading Laid Over to 03/24/2025 - No Amendments
- **2025-03-18T06:00:00+00:00** Senate Committee on State, Veterans, & Military Affairs Refer Amended to Senate Committee of the Whole `committee-passage, referral-committee`
- **2025-02-28T07:00:00+00:00** Introduced In Senate - Assigned to State, Veterans, & Military Affairs `introduction`
- **2025-02-25T07:00:00+00:00** House Third Reading Passed with Amendments - Floor `passage, reading-3`
- **2025-02-24T07:00:00+00:00** House Third Reading Laid Over Daily - No Amendments
- **2025-02-21T07:00:00+00:00** House Second Reading Special Order - Passed with Amendments - Committee, Floor
- **2025-02-19T07:00:00+00:00** House Second Reading Laid Over Daily - No Amendments
- **2025-02-13T07:00:00+00:00** House Committee on Business Affairs & Labor Refer Amended to House Committee of the Whole `committee-passage, referral-committee`
- **2025-01-28T07:00:00+00:00** Introduced In House - Assigned to Business Affairs & Labor `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/4183ca16-7655-4da5-b294-292a3943a4cb`. Confidence: reported (aggregated from official Colorado legislature records).