Master Gunnery Sergeant

Master Gunnery Sergeant (MGySgt) is the ninth and highest enlisted rank (along with the grade-equivalent ranks of Sergeant Major and Sergeant Major of the Marine Corps) in the United States Marine Corps. Master Gunnery Sergeants are senior staff non-commissioned officers (SNCOs), and are assigned a pay grade of E-9.

Master Gunnery Sergeants are sometimes referred to by the nickname "Master Guns", "Master Gunny", or "Top". These nicknames are unacceptable in formal or ceremonial situations, and, at the rank holder's discretion, may also be unacceptable for use by lower-ranking Marines.

The Master Gunnery Sergeant insignia consists of a bursting bomb (colloquially referred to as a "pineapple" due to the similarity of its appearance as stylized) centered vertically between three chevrons and four rockers.