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.
Heal for 600 after hitting an enemy with Shoulder Bash.
Gain 40% Lifesteal.
Increase your maximum Ammo by 2.
Generate 2 Ammo after activating Siege Shield.
Increase your maximum Health by 750.
Reduce your damage taken by 75% while using Shoulder Bash.