Service Stars

Service Stars are a new multiplayer feature introduced in Battlefield 3. They are given to players once a fixed objective has been completed. Weapon service stars are awarded every 100 kills for 2000 points, and are available only to non-handgun and non-gadget weapons. Handguns and gadget weapons both do have service stars attached to them, but are not displayed when taken and do not award any points. Vehicle and kit service stars are awarded when there is nothing left to unlock, or when the next service star point level is reached, and are worth 10000 points. Once the player has reached the highest rank, they may continue to gain Colonel service stars up to 100 times.

All service stars have an identical appearance, being a slate-grey, five-pointed star.

Assault Service Star
The Assault Service Star is acquired with a total accumulation of 220,000 experience points with the Assault Kit. It nets you a total of 10,000 experience and can be rewarded numerous times. However, one must acquire 220,000 experience each time to earn it. This can be achieved a total of five times. Each Service star will result in another dogtag and 10,000 experience, however this dogtag will have a star corresponding to each time received. The fifth and final Service tag will have five stars and the entire dogtag is gold. The Assault Service Star also comes with a dog tag unlock, "Assault Dog Tag". It is represented by a heart with defribillators on each side. This dog tag is worn on the left of the two available dog tag spots. The first Service Star is unlocked at the same time that all weapons for that specific kit are unlocked as well as faction specific weapons being able to be used by each team.

Support Service Star
Support service stars are awarded once there is nothing left to unlock in the class.

You will know when you have this service star once you've collected 170,000 points you will also be rewarded with a support service star Dog tag.