Shield
Azure, a Colonial powder horn bottom to base and mouth to dexter chief Argent stringed and garnished Proper.
Crest
That for the regiments of the Massachusetts National Guard on a wreath of the colors (Argent and Azure), a dexter arm embowed clothed blue and ruffed white Proper grasping a broad sword Argent, the pommel and hilt Or.
Motto
KEEP YOUR POWDER DRY.
A large portion of this regiment is recruited from areas which sent men to the Minute Man organizations in the war of the Revolution. From 1855 through the Civil War service the Regiment was known as "Minute Men." The old Minute Men of the Revolutionary period carried the powder horns. This regiment has had service in the Civil War, Spanish American War, in Puerto Rico and in the World War, as the 4th Pioneer Infantry.
The coat of arms was approved on 17 Nov 1923.