Assault
The Assault class carries a primary weapon consisting of an assault rifle — like the M4 and AK-47 — and is now merged with the medic class — the Assault class can now heal and revive teammates. It can also function as a more offensive class with ability to swap out the revive kit for a grenade launcher.
Support
The Support class packs a Light Machine Gun (like an M249 SAW), and has the ability to resupply ammunition to teammates. Furthermore, the Support class can also use lighter weapons, like an M4, with several attachments, including a powerful flashlight which has the ability to blind enemies in dark places.
Engineer
The Engineer’s primary role is to engage tanks and armored vehicles with an array of rocket launchers such as the RPG-7 and the AT4. The primary weapon is a carbine rifle, with a variety of unlocks available, ranging from shotguns to sub machine guns.
Recon
The Recon class carries a sniper rifle for long range engagement, and has the ability to call in artillery strikes (unlock). Furthermore, the Recon can equip unlocks like C4 explosives to blow up enemy vehicles or map objectives.