The Back To Karkand Add-on for Battlefield 3 has 5 achievements worth 120 gamerscore.
Get a kill with the following weapons in a single life: Assault Rifle, Jet, Tank
Get a kill with each of the following vehicles: the BTR-90, DPV and F-35.
Get 10 kills with each of the ten Back to Karkand weapons
Get a kill with the skid loader
Take a swim in the Oman Hotel swimming pool