Bonjour,
Dice a donné la liste des spécialisations de ce BF4, elles ne sont pas définitives mais il n'y en aura apparement pas de nouvelles.
Voici la liste:
SPECIALISATION IN-GAME EFFECT
SPRINT Increases maximum sprint speed
AMMO Increases maximum inventory of bullets
C4 EXPLOSIVES Increases maximum inventory of C4 explosives
COVER Decreases amount of incoming suppression
SUPPRESSION Increases the amount of outgoing suppression
FLAK Decreases explosion damage
GRENADES Increases maximum inventory of hand grenades
(NEW) ROCKETS Increases maximum inventory of AT (anti-tank) and AA (anti-air) ammo
(NEW) MINES Increases maximum inventory of AT Mines or M2 SLAM
(NEW) STEALTH Player is undetected by Motion Sensors except when sprinting
(NEW) HOLD BREATH Increases time you can Steady your scope
(NEW) FAST REPAIR Increases speed and sabotage of Repairs
(NEW) DEFIB UPGRADE Increases charge up speed of the defibrillators
(NEW) 40mm GRENADES Increases maximum inventory of 40mm grenades
(NEW) ADVANCED SPOT Increases time your targets are Spotted
(NEW) MEDKITS UPGRADE Increases maximum deployed medic bags and packs
(NEW) MOTION SENSORS UPGRADE Increases the maximum inventory of Motion Sensors. Increases the range of T-UGS and MAV
(NEW) MORE DEPLOYED EXPLOSIVES Increases maximum deployed Explosives
(NEW) AMMO BAG UPGRADE increases maximum deployed ammo boxes and packs
(NEW) ARMOUR Reduces incoming damage to the chest
(NEW) QUICK UNSPOT Reduces time you are spotted
(NEW) MEDICAL UNIT Occupied vehicles will slowly heal nearby soldiers
(NEW) SUPPLY UNIT Occupied vehicles will slowly resupply nearby soldiers
(NEW) REPAIR UNIT Occupied vehicles will slowly repair nearby vehicles
(NEW) REDUCED FALL Increases height you can fall without damage
(NEW) QUICK REGEN Decreases time before out of combat heal
(NEW) MP-APS UPGRADE Longer uptime on MP APS
(NEW) INDIRECT FIRE UPGRADE Increases maximum M224 ammo. Increases maximum XM25 magazines
(NEW) CLAYMORES Increases the maximum inventory of claymores
Et la source : http://www.ea.com/uk/news/road-to-battlefield-4-tweaked-core-field-upgrade?sourceid=Origin_AFF_LS315&c=TnL5HPStwNw&LSsiteID=TnL5HPStwNw-DCrITZmPVj4Fgkm_99M4PQ
À vous de raler maintenant. 
