If you don't like faction mods, and are concerned with the low ammo/magazine count this weapon has, this build will get you through those tough times.

[Slip Magazine] is the optional slot. Combined with [Trick Mag], it provides us with an extra 8 ammo. ([Primed Slip Magazine] fits in the same slot, but doesn't provide enough boost for any additional magazine over what the normal mod does)

Switch it out with Pathogen Rounds for Gas, or Convulsion for Radiation which can cater to different factions or settings as needed - Switch Cascadia Flare for Secondary Merciless if you do.
It can also be switched for [Stunning Speed] for a slight boost in Reload Speed and Status if you're not too concerned about ammo count.

Creeping Bullseye is used over Primed Pistol Gambit for a slight boost in crit with a non-noticeable reduction in fire rate.

[Primed Fulmination] is used because ......well, because I like more room for my boom. It also provides better chances to proc Cascadia Flare, since we're going Fire only on this.