In dueling statements, the California Rifle & Pistol Association praised Thursday’s ruling against the state’s background check law as a “massive victory for gun owners in California,” while Gov. Gavin Newsom called the decision a “slap in the face.”

The 9th U.S. Circuit Court of Appeals ruled Thursday that California’s law requiring background checks for people purchasing ammunition is unconstitutional, upholding a San Diego federal judge’s previous ruling that struck the law down.