A hard-fought firearms case is coming to the 9th U.S. Circuit Court of Appeals for en banc arguments Thursday, with the usual gun groups weighing in as amici on the usual sides.

Though the case arose in Alameda County, Calif., home to California Attorney General Jerry Brown, he hasn’t submitted briefs. But in another case across the country, involving the same issue, Brown filed an amicus that has gun control advocates shaking their heads.