A federal appeals court says a California law requiring background checks to buy bullets is unconstitutional. Voters passed the law in 2016 and it took effect in 2019.

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 law violates the Second Amendment, a panel of the U.S. Court of Appeals for the Ninth Circuit ruled in a 2-1 decision.