On July 20, 2025, the 9th Circuit Court of Appeals upheld Californias contested requirement that all new semiautomatic pistols sold in the state be equipped with microstamping technology. The law, which mandates that new handguns imprint unique identifying numbers on shell casings when fired, continues to be a flashpoint for national Second Amendment debates. Firearm manufacturers and advocacy groups, including the National Shooting Sports Foundation, have long argued that the technology is not yet viable at scale and that the rule effectively bans new handgun models by virtue of unattainable compliance. In its 2-1 opinion, the court ruled that the technology is sufficiently developed for legislative purposes and that the regulation does not constitute an unconstitutional infringement. Californias attorney general praised the decision, describing it as a step forward for public safety and gun crime investigation capabilities. Meanwhile, gun rights supporters blasted the ruling, warning that such technological mandates could set a precedent for other states, further limiting consumer choices and innovation in the industry. Industry insiders also worry about the financial and logistical challenges imposed by microstamping, particularly on small manufacturers and local firearm retailers. Several advocacy groups have already signaled intentions to escalate the case to the U.S. Supreme Court.