+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.
+6-12% Critical Chance for each Enemy Hit by your previous attack. Stacks 5 times.