It should be a sword or some other very short range weapon. Here is my reasoning. For primary you have a long range weapon: scout rifles. Mid range weapons: pulse rifles and autorifles. And a short range weapon: handcannons. For special you have long range: sniper rifles. Medium range: fusion rifles. And short range: shotguns. For heavy you have long range: rocket launchers. And medium range: machine guns. You do NOT have a short range weapon. I would love a sword, some light saber kind of thing that channels my Guardian's inner light into a weapon would be awesome. Either that or a LOtR Sauron style mace.