Many builds have really high DPS, but very low practicality. What many builds miss is punch through. In this game, you almost need punch through to clear a room (or at least a cone in front of you).

This build is a critical build. You may notice that I'm running radiation on this build. I could go for Viral, or Corrosive, but those lower my average DPS and don't synergize well with other mods. And, critical damage is what we are here for anyways.

MOD EXPLANATION:

(Primed) Point Blank, (primed) Ravage, Hell's Chamber- DPS and Critical chance. Trade these out with non-primed if you don't have them.

Blaze, (Primed) Charged Shell- Adds a lot of damage through status. The status proc itself doesn't matter too much here (Crit, remember?).

Seeking Fury, Laser Sight (or Vigilante Armaments)- These two are the core of this build. [Laser Sight] allows you to up your crit chance to 66% on a headshot (+100k sustained DPS), while [Seeking Fury] provides punch through. This punch through will get you through rooms, rather than just through one or two enemies. If you don't have (or want to use) [Laser Sight], I say swap it out with [Vigilante Armaments] [Blunderbuss]. It lowers your sustained DPS to around 95k DPS, but has no "on" condition

You don't need [Vigilante Supplies], but it helps.

TL;DR
Crit+Punch through

I have a lower DPS, but easier to build [Corinth] (Prime) build too, as this one needs a lot of work to [Reach].