7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
3.5-5% Strength for 3.5s on Hit. Stacks 5 times.
Killing an enemy by firing both barrels makes your next Reload 40-70% faster.
Increased Cleave on Critical Hit and gain 10-25% Ranged Attack Stagger.
You can swap Superiority Complex or the crit chance node for Target Down! if you want. Personal preference if you don't mind tagging stuff.