This is our proprietary skill rating calculation. This has nothing to do with official game ranking or MMR.
The purpose is to show player skill levels relative to other players, not estimate MMR.
Generate 12 Ammo for each enemy hit with Frag Grenade.
Generate 21 Ammo after getting a Killing Blow or Elimination.
Increase your maximum Ammo by 8.
Regenerate 4 Ammo every 1s while using Hustle.
Increase your maximum Health by 200.
Heal for 300 per second while using Hustle.