12-24% Rending on Enemy Weak Spot Hit for 3.5s. Stacks 5 times.
1-4% to Instakill human-sized enemies on Chained Heavy Hit. Stacks 5 times. Note that other potential triggers will not be activated on Instakill.
30-60% Rending on Critical Hit.
4.5-6% Critical Chance for each expended round in your weapon (resets on reload).