A hybrid build focused on viral procs with a bit of crit damage mixed in. Works well with an innate heat [Karak], but should work with a toxic or cold [Karak], just replace [Malignant Force] or [Rime Rounds] with [Thermite Rounds].

[Hush] is a filler to make use of the exilus slot, and is not necessary.

Burns through ammunition quickly, so make use of either an ammo mutation in the exilus slot or the [Carrier] sentinel with [Ammo Case].
[Speed Trigger] may also be replaced with [Vigilante Armaments] to conserve ammunition, but I did not notice significant DPS change during testing.
The weapon has innate 0.2 punch through, so [Shred] is not necessary, but [Primed Shred] will increase punch through for a 5% ROF cost, so feel free to make use of it.

Viral is used to increase all damage dealt to health (up to +325% at 10 procs), which works well with the heat proc for high DOT. Corrosive is not used as it is less useful against Corpus or Infested, and this build is intended to be general use.

Testing shows it can bring down level 120 Ancients in less than a second, level 120 Corpus Techs in 2 seconds, and level 120 Heavy Gunners in about 4 seconds, 3 with consistent headshots (tested in Simulacrum with 28% heat Karak).

Accuracy is not much of an issue at longer ranges when firing in controlled bursts (tested at 65m firing for 0.5 - 1 second in Simulacrum).

As shown in this image, one magazine of this build inflicts roughly 90 status effects.