Litigation tracker
Lawsuits challenging Colorado firearms laws, drawn from public federal and state court dockets. Each case page lists the parties, what's being challenged, and a running timeline of filings drafted directly from the docket — no outcome predictions, no legal analysis beyond characterizing what was filed. Filings in these cases turn on implementation facts: fees, waits, and availability. The documented record is at /cost and, county by county, at /counties. That link now runs both ways: the August 11, 2026 preliminary-injunction motion inDel Toro v. Polis attaches a sworn declaration from the Teller County sheriff about why his office is not issuing eligibility cards, which is the firmest source this project has for that county's status.
| Case | Court | Challenge target | Filed | Status | Last docketed event |
|---|---|---|---|---|---|
| CSSA v. Colorado Firearms Dealer Licensing Scheme | Unresolved — see notes | The state firearms-dealer licensing scheme created by HB24-1353 (2024), administered by the Colorado Department of Revenue's Firearms Dealer Division | Unresolved — see notes | Unresolved — no distinct docket found; see notes | No events logged yet |
| Elliott v. City and County of Denver, Colorado | U.S. District Court, District of Colorado | Denver's 1989 assault-weapons ordinance and the state's 15-round magazine limit (C.R.S. § 18-12-302), together | 2026-06-30 | Pending — case reassigned after the originally assigned judge's recusal on 2026-07-06; no motions ruled on yet | 2026-07-28 — order ⚑ |
| Colorado Firearms, Ammunition and Accessories, LLC v. Polis | U.S. District Court, District of Colorado | HB26-1126 — expanded firearms-dealer record-keeping requirements and warrantless law-enforcement access to dealer purchase records | 2026-06-12 | Pending — defendants waived formal service on 2026-06-18; response due 2026-08-17 | 2026-06-16 — order ⚑ |
| United States v. State of Colorado | U.S. District Court, District of Colorado | C.R.S. § 18-12-302 — the 15-round ammunition-magazine capacity limit (in place since 2013) | 2026-05-06 | Pending — defendants' motion to dismiss filed 2026-06-30, not yet ruled on | 2026-06-30 — motion |
| Del Toro v. Polis | U.S. District Court, District of Colorado | SB25-003 — the semiautomatic-firearm eligibility-card / permit-to-purchase requirement (C.R.S. Title 18, Art. 12), effective 2026-08-01 | 2025-09-02 | Pending — plaintiffs moved for a preliminary injunction on Aug. 11, 2026 (entry 82); no ruling yet on the docket entries reviewed | 2026-08-11 — motion ⚑ |
| Langston v. Humphreys | District Court, City and County of Denver, Colorado (state court) | Proposition KK — the 6.5% excise tax on retail firearm, firearm-precursor-part, and ammunition sales | 2025-04-01 | Pending — state filed its answer 2025-05-20 | No events logged yet |
Docket data from CourtListener ↗ (Free Law Project). Some matters are filed in state court, which CourtListener does not carry; those case pages note it explicitly.