Gunnery Sergeant is a rank found exclusively in the United States Marine Corps. It is ranked E-7 and is abbreviated as GySgt. Gunnery Sergeants are commonly referred to by the nickname "Gunny". The use of the term "Gunny" to refer to a Gunnery Sergeant is acceptable by everyone, including enlisted personnel who are of a lower rank. The only time the term "Gunny" is unacceptable is in ultra-formal situations.
