+7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
+6.5-8% Strength for 3.5s on Hit. Stacks 5 times.
+3.5-5% Critical Chance for every 10% of magazine spent during continuous fire. Stacks 5 times.
+4.25-5% Strength for every Enemy you Stagger. Stacks 5 times.
Literally any weapons will work.