5-8% toughness on Chained Hit.
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.
3-6% Explosion Radius for every shot fired during continuous fire. Stacks 5 times.
5-8% Strength for every shot fired during continuous fire. Stacks 5 times.