For Battlefield 3, the points system is different from previous BF games as points have increased for some activity such as Kills which now gets 100 points. Here is the full breakdown of the Battlefield 3 points system.
Kill points:
Assist points:
- Kill enemy: 100 points
- Knife kill: 300 points
- Comeback kill: 60 points
- Headshot bonus: +10 points
- Eliminate enemy squad: +10 points
- Savior bonus: +20 points
- Avenger bonus: +10 points
- Destroy vehicle: 200 points
- Disable vehicle: 100 points
M-COM objective points:
- Kill assist: from 10 to 60 points
- Spot assist: 10 points
- Squad kill assist: from 10 to 60 points
- Squad spot assist: 20 points
- Suppressive fire assist: +10 points
- Squad spawn on you: +10 points
Support
- M-COM arm: 200 points
- M-COM disarm: 200 points
- M-COM destroy: 200 points
- M-COM attack bonus: +20 points
- M-COM defend bonus: +20 points
- Revive teammate: 100 points
- Squad revive: +20 points
- Squad Spawn on you: 10 points
- Repair: +20 points
- Squad repair: +30 points