What are the new Battlefield 3 assignments?

Go to battelog, in the upper right menu click in Missions.

You will unlock the new guns doing missions.

FAMAS (“Best Friend Forever” assignment)

• 10 heals
• 10 revives

L85A2 (“Professional Russian”)

• 100 kills with assault rifles
• 20 kills with grenade launcher
• Win 5 rounds of Squad Deathmatch

MP5 / HK53 (“Fixing it”)

• 10 repairs
• 1 kill with repair torch

QBZ-95B (“It Goes Boom”)

• 50 anti-tank rocket kills
• 5 conquest round wins
• Destroy 1 enemy vehicle with repair torch

QBB-95 (“Let It Rain”)

• 20 kills with light machine guns
• 2 mortar kills

QBU-88 (“Specops”)

• 20 sniper rifle kills
• 5 laser designator assists

MG36 (“Keep Your Head Down”)

• 100 kills with light machine guns
• 50 suppression kill assists
• 50 ammo resupplies

L96 (“Creeping Death”)

• 50 headshots
• 50 spot assists
• 5 knife kills

PP-19 (“Familiar Territory”)

• Capture 10 flags
• Arm 10 MCOM stations
• Play 2 hours on Strike At Karkand

Jackhammer / MK3A3 (“Scarred Veteran”)

• 10 kills with PP-19
• 10 kills with BTR-90
• 5 kills with DPV jeep
• Play 2 hours on Gulf of Oman
• Play 2 hours on Sharqi Peninsula