---
type: "Bill"
title: "Firearm Serial Number Check Request Procedure"
description: "The act establishes a procedure allowing a federal firearms licensee (licensee) to request a firearm serial number check prior to purchasing a firearm from an individual and requires a local county sheriff's office or police department to complete the serial number check within 3 days after the request. The firearm serial number check must include information regarding whether the firearm is stolen, lost, or is involved in an open criminal investigation."
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2025A"
identifier: "SB 25-205"
citation: "Colorado SB 25-205 (2025A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Cecelia Espenoza", "Nick Hinrichsen", "William Lindstedt"]
version_count: 9
action_count: 14
vote_count: 12
first_action: "2025-03-25T06:00:00+00:00"
last_action: "2025-06-02T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/874b190d-23db-4155-8714-753a87a6acef"
source_url: "https://leg.colorado.gov/bills/sb25-205"
source_hash: "ee24a3afc89a75f1b16a938cc5b84f5005a02c912d577113bb2724ab934ff891"
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 SB 25-205 (2025A) — Firearm Serial Number Check Request Procedure

The act establishes a procedure allowing a federal firearms licensee (licensee) to request a firearm serial number check prior to purchasing a firearm from an individual and requires a local county sheriff's office or police department to complete the serial number check within 3 days after the request. The firearm serial number check must include information regarding whether the firearm is stolen, lost, or is involved in an open criminal investigation.

## 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_sb205_h_sa_001.pdf)
2. **Engrossed (04/07/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_eng.pdf)
3. **Final Act (05/02/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_enr.pdf)
4. **Introduced (03/25/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_01.pdf)
5. **PA1 (04/02/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_s_sa_01.pdf)
6. **Reengrossed (04/08/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_ren.pdf)
7. **Rerevised (04/25/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_rer.pdf)
8. **Revised (04/24/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2025A/bills/2025a_205_rev.pdf)
9. **Signed Act (06/02/2025)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2025a_205_signed.pdf)

## Votes

- CONCUR — **33–0** (pass) · upper
- REPASS — **22–11** (pass) · upper
- BILL — **23–11** (pass) · upper
- AMD — **23–38** (fail) · lower
- AMD — **24–37** (fail) · lower
- AMD — **22–39** (fail) · lower
- AMD — **25–36** (fail) · lower
- AMD — **28–33** (fail) · lower
- AMD — **25–36** (fail) · lower
- AMD — **23–38** (fail) · lower
- AMD — **24–37** (fail) · lower
- BILL — **36–27** (pass) · lower

## Sponsors

- Cecelia Espenoza — primary (person)
- Nick Hinrichsen — primary (person)
- William Lindstedt — primary (person)
- A. Boesenecker — cosponsor (person)
- A. Valdez — cosponsor (person)
- C. Kipp — cosponsor (person)
- D. Michaelson Jenet — cosponsor (person)
- E. Hamrick — cosponsor (person)
- I. Jodeh — cosponsor (person)
- J. Bacon — cosponsor (person)
- J. Coleman — cosponsor (person)
- J. Gonzales — cosponsor (person)
- J. Joseph — cosponsor (person)
- K. Brown — cosponsor (person)
- K. McCormick — cosponsor (person)
- K. Wallace — cosponsor (person)
- L. García — cosponsor (person)
- L. Gilchrist — cosponsor (person)
- L. Smith — cosponsor (person)
- M. Froelich — cosponsor (person)
- M. Lindsay — cosponsor (person)
- M. Weissman — cosponsor (person)
- T. Sullivan — cosponsor (person)

## Timeline

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

- **2025-06-02T06:00:00+00:00** Governor Signed `executive-signature`
- **2025-05-02T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2025-05-02T06:00:00+00:00** Signed by the Speaker of the House
- **2025-05-01T06:00:00+00:00** Signed by the President of the Senate
- **2025-04-28T06:00:00+00:00** Senate Considered House Amendments - Result was to Concur - Repass
- **2025-04-25T06:00:00+00:00** House Third Reading Passed - No Amendments `passage, reading-3`
- **2025-04-24T06:00:00+00:00** House Second Reading Special Order - Passed with Amendments - Floor
- **2025-04-21T06:00:00+00:00** House Committee on State, Civic, Military, & Veterans Affairs Refer Unamended to House Committee of the Whole `committee-passage, referral-committee`
- **2025-04-08T06:00:00+00:00** Introduced In House - Assigned to State, Civic, Military, & Veterans Affairs `introduction`
- **2025-04-08T06:00:00+00:00** Senate Third Reading Passed - No Amendments `passage, reading-3`
- **2025-04-07T06:00:00+00:00** Senate Second Reading Passed with Amendments - Committee `reading-2`
- **2025-04-04T06:00:00+00:00** Senate Second Reading Laid Over to 04/07/2025 - No Amendments
- **2025-04-01T06:00:00+00:00** Senate Committee on State, Veterans, & Military Affairs Refer Amended to Senate Committee of the Whole `committee-passage, referral-committee`
- **2025-03-25T06:00:00+00:00** Introduced In Senate - Assigned to State, Veterans, & Military Affairs `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/874b190d-23db-4155-8714-753a87a6acef`. Confidence: reported (aggregated from official Colorado legislature records).