What's interesting is the weapon has a shield portion, so if such a thing was to make it in game, it could exist as a dual wield weapon, where it somehow occupied both the weapon and shield slot and you would still have a shield. Charging would probably fire off some saw blades and normal attacking some right left right left right left swinging. Swapping weapons would cause it to remain on both hands but simply not be used for attacking. You could also make the weapon take up two slots if you wanted to be a melee and gun instance.

Granted, such a thing would take some interesting special purpose code and would do best to be abstracted out for future weapons to use after. I currently cant think of any clean code that would allow for that but since I have not dug into any of how this game actually works aside from the models I wouldn't be able to make any evaluations anyway.

Of course, to have such a thing in game you could just make it a separate sword and shield and make the weapon's power increase and animations a tad different when used in combination with the matching shield.