1-4 Bleed Stacks on non-Weak Spot Hits.
5-8 Bleed Stacks on Critical Hit.
4.25-5% Strength for every Enemy you Stagger. 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.
You can substitute Gunner Resistance for Tox Flamer resistance if you find yourself getting beat down by the flames more often than gunners. Stamina regen is a filler slot as well, but highly recommended as you'll be relying on blocking and shoving a lot.
Your bolter exists purely to take out Crushers, Maulers, and Mutants. The combat blade deals with everything else reliably.