1. A noncommissioned officer in pay grade E-7 who wears three chevrons and two rockers with crossed rifles between them on both sleeves or collar points as appropriate. 2. In the Army that pay grade is a sergeant first class (essentially the same insignia in different colors without the crossed rifles). 3. In the Air Force it is master sergeant (the insignia of a technical sergeant with one chevron above the five rockers. In the Navy and Coast Guard it is chief petty officer (three inverted chevrons with an inverted rocker above, upon which is perched an American eagle).