So I got lucky and someone sold me that Riven Mod for dirt cheap (Maxed too). Though even without that riven, you can stack some other damage mod there and it would do you just as well.

I made [Shred] only at 20% because any higher and you loose the Infinite shooting capability because it would need time to reload (at least, with this setup anyway). At 20% you can just hold down on the attack button and never let go, its a nice speed, not super fast but not super slow either (Unless reloading doesn't bother you in which case, go for max [Shred]).

Feel Free to change out the [Thermite Rounds] to other damage types mods that best suit your needs (i.e. [Rime Rounds], [Malignant Force] or [High Voltage])