Here is the full list of all 10 Nine to Five achievements.
Kill or incapacitate 500 enemies with any Assault Rifle. Unlocks the Old Patchy - Mash Media Collection.
Kill or incapacitate 500 enemies with any Sniper Rifle. Unlocks the Mile High - Mash Media Collection.
Kill or incapacitate 500 enemies with any Shotgun. Unlocks the Gambler - New World Finance Collection.
Kill or incapacitate 100 enemies with any Pistol. Unlocks the Cardinal - New World Finance Collection.
Kill or incapacitate 500 enemies with any SMG. Unlocks the Canary - New World Finance Collection.
Kill or incapacitate 500 enemies with any LMG. Unlocks the ML-LMG - Farmira Collection.
Kill or incapacitate 200 enemies with headshots. Unlocks the ML-BA308 - Farmira Collection.
Reach Level 15. Unlocks the Butler - New World Finance Collection.
Max out any upgradable Weapon Parameter of a single gun. Unlocks the Mad Dog - Mash Media Collection.
Reprogram all Weapon Parameters of a single gun with Mint Hacking Codes. Unlocks the ML-CR - Farmira Collection.