Hitting at least 3 enemies with an attack, increases your damage by 24-36% for 3 seconds.
2.5-4% Bonus Critical Chance on Chained Hit. Stacks 5 times.
30-60% Rending on Critical Hit.
10% Critical Chance for every 0.3-0.45 second while aiming. Stacks 10 times. Discharges all stacks upon firing.
WS is key for Devils Claw and Revolver easily one shots most things, so quick draw, fire a shot, then swap back to DC.
Stamina also key for parrying, hence block efficiency.