ShieldAzure, an oak tree Or; on a chief dancette Gules fimbriated Argent three alerions of the second.
CrestThat for the regiments and separate battalions of the Army Reserve: On a wreath of the colors Or and Azure 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.
MottoJAMAIS TROP TARD (Never Too Late).
ShieldThe shield is blue for Infantry and blue is also the color of the shield of the coat of arms of St. Mihiel. The dancette participation line alludes to the three rocks on the coat of arms of St. Mihiel. The oak tree represents service in the Meuse-Argonne. The arms of Lorraine are "Or, on a bend Gules three alerions of the field," and the three alerions on the red chief denote service in Lorraine.
CrestThe crest is that of the United States Army Reserve.
The coat of arms was originally approved for the 311th Infantry Regiment on 12 March 1929. It was redesignated for the 311th Regiment on 8 July 1960.