Shield
Gules, two pallets Argent, on and over a fess Vert between in chief overall five rays beveled counter beveled issuant fanwise blended from base blue through green and yellow to orange and in base a Lorraine Cross Or, an escallop of the last charged with a Spanish castle of the first and between two cannons palewise of the second.
Crest
On a wreath of the colors Or and Gules a sheaf of twelve arrows Argent behind a garb pieced by a fishhook fesswise, hook to sinister and base, Or.
Motto
AUDACIA (By Daring Deeds).
Shield
The shield is scarlet for Artillery and with the two white stripes, representative of the campaign ribbon of the War of 1812, depicts the age of some of the units of the regiment. The green fess refers to the Mexican War service and the two silver cannons allude to those lost without dishonor and regained with glory during that war. The escallop, the emblem of St. James, with the Spanish castle, represents the battle of Santiago, Cuba. The Lorraine Cross signifies the service of a battery of the regiment in Lorraine during World War I. The five rays, indicative of the aurora borealis, denote the service of five batteries of the regiment of Alaska.
Crest
The garb and fishhook commemorate participation in the Battle of Gettysburg in the wheat field, the fishhook being the shape of the Federal battle line. The twelve arrows denote the twelve Indian battles.
The coat of arms was originally approved for the 4th Coast Artillery Regiment. It was redesignated for the 4th Antiaircraft Artillery Battalion on 12 March 1956. It was cancelled on 21 April 1959. The insignia was restored and authorized for the 4th Air Defense Artillery Regiment effective 1 September 1971.