7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
2.5-4% Bonus Critical Chance on Chained Hit. Stacks 5 times.
Target receives 1-4 Stacks of 2.5% Brittleness on direct projectile hit. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
1-4% Toughness for every 10% of magazine spent during continuous fire. Stacks 5 times.