Marine Corps Gunnery Sergeant Rank Black Finish Pin is the official United States Marine Corps insignia for the Gunnery Sergeant rank. Gunnery Sergeant is the 7th rank in the United States Marine Corps, which is above Staff Sergeant and just below Master Sergeant. This is a Noncomissoned officer with a pay grade of E-7. Gunnery Sergeant are in charge of combat training, helping with individual training to Marines in the designated branch. This gold finish pin is the official issue for the United States Marine Corps rank of Gunnery Sergeant. Sold in pairs measuring at ⅞ inches and made in the USA.