# US firearm waiting period legal challenges > Live situation record from CLSTR: https://clstr.news/situations/us-firearm-waiting-period-legal-challenges > Updated: 2026-09-29T15:27:22.000Z. Sources: 5. Developments: 2. Legal challenges against firearm purchase waiting periods are intensifying in several U.S. states. In New Mexico, a U.S. District Court judge ruled against a seven-day waiting period in the case of Ortega v. Grisham, a decision supported by the NRA that allows residents to acquire firearms immediately following background checks. Governor Michelle Lujan Grisham is expected to appeal. In Maine, litigation has escalated regarding a 72-hour waiting period enacted in 2024. While supporters argue the law acts as a ‘cooling off’ measure to prevent impulsive purchases and suicides, opponents claim it unconstitutionally restricts Second Amendment rights. Following a First Circuit Court of Appeals decision that upheld the law, a 25-state coalition led by Montana has filed an amicus brief with the U.S. Supreme Court in Beckwith v. Frey. The coalition argues the waiting period is a ‘historical anomaly’ that prevents citizens from exercising their right to ‘keep’ arms immediately. ## Timeline ### 2026-09-29: Montana leads 25-state coalition challenging Maine firearm waiting period Twenty-five U.S. states, led by Montana, have asked the Supreme Court to review Maine’s 72-hour firearm waiting period, arguing the law is an unconstitutional restriction on Second Amendment rights. 2 sources. https://clstr.news/cluster/montana-leads-25-state-coalition-challenging-maine-firearm-waiting-period ### 2026-08-31: Legal challenges target gun purchase waiting periods in New Mexico and Maine Legal battles continue over gun purchase waiting periods as a New Mexico judge strikes down a seven-day delay and Maine plaintiffs petition the Supreme Court to review its 72-hour rule. 5 sources. https://clstr.news/cluster/legal-challenges-target-gun-purchase-waiting-periods-in-new-mexico-and-maine --- Cite as: US firearm waiting period legal challenges. CLSTR, https://clstr.news/situations/us-firearm-waiting-period-legal-challenges