ShieldPer fess Argent and Azure, in chief a palm tree on mount Proper and in base a giant cactus and a fleur-de-lis Or.
CrestThat for the regiments and separate battalions of the Montana Army National Guard: On a wreath of the colors Argent and Azure a fleur-de-lis the middle leaf and tie Or, and outside leaves Argent.
MottoMEN, DO YOUR DUTY.
ShieldThe palm tree represents Philippine service, the giant cactus Mexican Border duty and the fleur-de-lis service in France during World War I. Blue and white are the colors associated with Infantry and refer to the organization's combat service as the 163d Infantry during World War II.
CrestThe crest is that of the Montana Army National Guard.
The coat of arms was originally approved for the 163d Infantry Regiment, Montana National Guard on 15 December 1941. It was redesignated for the 163d Armored Cavalry Regiment, Montana National Guard on 17 September 1953. The insignia was amended to change the symbolism on 21 January 1970. It was amended to add the crest of the State of Oregon on 22 March 1971. It was amended to delete the crest of the State of Oregon and add the crest of the State of Nevada on 20 January 1975. The insignia was redesignated for the 163d Infantry Regiment and amended to delete the crest of the State of Nevada on 1 February 1989.