ShieldOr, on six pallets couped Gules a fleur-de-lis encircled by a garland of laurel of the first.
CrestThat for the regiments and separate battalions of the California Army National Guard: On a wreath of the colors Or and Gules, the setting sun behind a grizzly bear passant on a grassy field, all Proper.
ShieldThe design is based on the coat of arms of the former 251st Coast Artillery Regiment and indicates the descent through the second battalion of that organization. The designs of the 682d Antiaircraft Artillery Gun Battalion and the 720th Antiaircraft Artillery Gun Battalion have been made alike but with the colors reversed to show their parallel descent and relation to each other. The colors are red and yellow for Artillery. The six pallets couped produce a diminished bordure effect on the shield and represent the six batteries comprising the Regiment at the time of its organization. The fleur-de-lis encircled by a garland of laurel, is taken from the canton of the coat of arms of the 250th Coast Artillery, as Battery B of the 251st Coast Artillery, California National Guard, is a descendant of Battery F of the 250th Coast Artillery, California National Guard, which served during World War I as B Battery of the 65th Coast Artillery (US).
CrestThe crest is that of the California Army National Guard.
The coat of arms was approved on 19 May 1952. It was rescinded on 5 July 1961.