A Gold color metal and enamel device 1 1/4 inches (3.18 cm) in height overall consisting of a Blue belt inscribed PRO PATRIA ARMAMUS and with two mullets to sinister base, all Gold, its field Red bearing a shield blazoned: Gules, a chevron Silver Gray fimbriated Or between in chief the corps badge of the Seventh Army Corps of the Civil War (a crescent holding a mullet within its horns both reversed) and a Roman sword point down and in base a fleur-de-lis between two rounds of fixed ammunition all of the third.
The gray and gold chevron typifies the colors of the original uniform of the Regiment worn by it fifty years. The blue represents the service of the Regiment as Infantry in the Civil War and the War with Spain. The red represents the service of the Regiment as Artillery in France during World War I when the Regiment was divided into two organizations: the 59th and 70th Artillery, as symbolized by the two projectiles. The motto translates to We Arm For Our Country.
The distinctive unit insignia was originally approved for the 245th Coast Artillery Regiment on 9 July 1925. It was redesignated for the 245th Antiaircraft Artillery Gun Battalion on 12 September 1951. The insignia was redesignated for the 245th Artillery Regiment on 22 March 1962. It was rescinded on 8 July 1976.