I'm customizing my character to be stealthy, and I only want to use a pistol. How do I get rid of the 2 giant primary weapons on my back?
It is worse than that. If you never equip a second primary it artificially lowers your gear score, and so you won't get decent gear drops after about level 28.
I hope you could at least hide or disable the second slot. It's strange how the rifles are attached to your back. Magic maybe. There should have been slings in this game.