In a landmark decision, the Ninth Circuit Court of Appeals has struck down California's ammunition background check law, citing a violation of the Second Amendment. This ruling marks a significant setback for California's stringent gun control measures and a triumph for gun rights supporters.

California voters in 2016 passed a ballot initiative championed by Gov. Gavin Newsom that in part required background checks for ammunition purchases. The 9th Circuit Court of Appeals found that provision violates the 2nd Amendment.

A federal appeals court upheld a ruling that struck down a background check requirement implemented by California on buyers of ammunition for firearms.