ShieldOr, upon a cross Gules a mullet of the field.
CrestThat for the regiments and separate battalions of the Army Reserves: 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.
ShieldThe shield is yellow for Cavalry. The cross, taken from the colonial seal and arms of the Merchants of Virginia, is indicative of Virginia, to which state the 307th Cavalry is allocated, and is red to represent Field Artillery service during World War I. The star symbolizes service in Texas.
CrestThe crest is that of the United States Army Reserve.
The coat of arms was approved on 12 January 1927. It was rescinded on 17 February 1959.