5-8% Strength for 4.5s on Kill. Stacks 5 times.
Up to 5-20% Strength based on the charge time of your heavy attacks. Stacks 3 times.
Each chained melee hit with the gauntlet adds a stack which increases Melee Strength by 2-5%. Stacks 10 times and each stack lasts for 1.5 seconds.
5-8% Strength every 0.4 seconds while aiming, stacking 5 times. Discharges all stacks upon firing.