This is a DPS build for the Darkzone. The Banshee 4 piece bonus only applies in the Darkzone. It is designed to be useful for solo and group play.
It can be used with literally any weapon in the game, I suggest running with at least one Assault Rifle or SMG in PvP though.
Rolling Stability or Accuracy on the weapon mods does not really matter, feel free pick your preferred handling stat. But the Optimal Range on the underbarrel is for SMGs more beneficial that Stability or Accuracy in my opinion.