1. A SHOULDER mounted sniper rifle why would you want that it would be heavy and annoying to carry around.
2. A Shotgun That fires sound waves. Last time I checked sound isn't lethal
3.A MG you can dual wield. The design is cool and all but it is unpractical to have. If it wasn't for that exosuit then you woul barely be able to move.
A Sniper Rifle with one bullet. Why just Why. Why not give it an actual magazine instead of forcing the poor soldier you sent out in the field to carry around a pocketful of .50 caliber sniper rounds probably stabbing him in hi appendix while he's moving around.