5-8% toughness on Chained Hit.
7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
7-10% Movement Speed Reduction for every 5% of magazine spent during continuous fire. Stacks 5 times.
5-8% Strength for every 10% of magazine spent during continuous fire. Stacks 5 times.
Lugg Nutts and unload rounds