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.
Increase your maximum Health by 750.
Increase your maximum Ammo by 1.
Reduce your active Cooldowns by 20% after getting an Elimination.
Reduce the Cooldown of Siege Shield by 4s.
Gain 20% Lifesteal.