Double Slash (Primary attack)
Stab (Secondary attack)
|“||A modified version of the M9 that is specially given to Sergeants. The rate of fire has been improved by modifying the gun grip. (Reward item for Sergeants)||”|
|— The Arsenal|
The M9 Professional is an upgraded version of the default M9 knife unlocked at the rank of Master Sergeant I. It features white feathers over a blue background on the handle and an eagle (the same as on the Professional Cap) on the blade. According to its description, the M9 Professional has a subtle faster "slice" rate than the M9.
- The engraving on the blade reads "N-9".