Yo Guys this is my favourite Secondary for a long time and I wanted to give you a Non-Riven Build so everyone is free to use it since Rivens are really expensive.
Dont worry if you cant afford a [Primed Pistol Ammo Mutation] or [Galvanized Diffusion] the alternates are also fine. The only expensive Mod here is [Galvanized Shot] which is actually a Musthave.
We want to hit our 100% Statuschance on each pallet so we're picking here the 3 Status Mods "[Pistol Pestilence], [Frostbite] and [Carnis Stinger]" in that Order. We want Viral Damage and then more Slashchance and also the Statuschanceboost. The Weapons main Damage is Slash which is the strongest Statuseffect together with Viral. This Combination Shreds Life.
This Weapon has a base Critchance of 11% and with that its absolutely useless for Crit-builds. There are hybrid Builds but we wont use that since Crit will fall off in true lategame.
We're playing with "Gunslinger" just to bypass the Speed-buildup and gaining our max DPS-Potential really quick. (Primed) Pistol Ammo Mutation is a Musthave since were wasting so much Ammo.

Pros:
-Has Endgame Potential
-Can kill really fast
-Really fast
-Shoots a Salve of Bullets at once
-Can be hold to shoot
-Slash is the Basedamage

Cons:
-Reload Speed
-nearly no crit

If you still want to get a perfect Riven for it make sure to get those Stats below.
Optimal Riven Stats:

Best Riven Stats:
+++Multishot
++Damage
++Statuschance
+Toxin/Heat (Toxin is the better one here)
and of course the -Zoom

GOOD TO KNOW:
If you really dont mind losing your ([Gunslinger]) Attackspeed you can use (Primed Quickdraw) for faster reloads which feels also really smooth! Keep in mind that you need to use a --- Polarity then.