Zealot
Hitting an enemy gives them 1-4 stacks of 2.5% Brittleness. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
5-8% Strength for 4.5s on Kill. Stacks 5 times.
Killing an enemy by firing both barrels makes your next Reload 40-70% faster.
5-6.5% Strength for 5s on Close Range Kill.