List of Halo 4 commendations/Weapons
From Halopedia, the Halo wiki
Weapons commendations are only advanced in War Games.
Kill enemy Spartans with any Turret Mounted Weapon. Completing this commendation will unlock the Enforcer "Tribal" (TRBL) armor set
Complete all of the following commendations: Covenant Loadout Mastery, Covenant Ordnance Mastery, Forerunner Loadout Mastery, Forerunner Ordnance Mastery, UNSC Loadout Mastery, UNSC Ordnance Mastery, Mounted Turret. Completing this commendation will unlock the Protector "Drift" (DRFT) armor set