Shield
Gules, a bendlet arched Or voided of the field.
Crest
That for the regiments and separate battalions of the Army Reserve: On a wreath of the colors Or and Gules, the Lexington Minute Man Proper. The statue of the Minute Man, Captain John Parker (H.H. Kitson, sculptor), stands on the Common in Lexington, Massachusetts.
Motto
KING OF BATTLE.
Shield
The narrow, arching bands represent Artillery trajectories.
Crest
The crest is that of the United States Army Reserve.
The coat of arms was originally approved for the 506th Field Artillery Battalion on 24 March 1958. It was redesignated for the 108th Regiment on 27 November 1959.