USMC Gunnery Sergeant Rank Green on Red is a service insignia that represents the rank of Gunnery Sergeant. The role of Gunnery Sergeant you can have a wide range of tasks like serve on Battalions staff, advising captains, and oversee other officers when called upon. Gunnery Sergeant is ranked above Staff Sergeant and right below First Sergeant. This green embroidered red rank is regulation size at 3 ¾ by 6 inches and displays two rifles crossing surrounded by service stripes. This rank is the official issue for the United States Marine Corps and is made in the USA.