Hitting at least 3 enemies with an attack, increases your damage by 24-36% for 3 seconds.
35-50% Cleave on Hit. Stacks 5 times.
3.5-5% Critical Chance for every 10% of magazine spent during continuous fire. Stacks 5 times.
Gain 7-10% Close Damage for 3.5 seconds after killing an enemy at close range, stacking 5 times.
Tag, bag, and revive, with a shit ton of toughness. Basically straight down the center tree.