Okay so the collab is called "Weapon Master collab" and yet there isn't a rule to have a weapon Lol.
I feel like this could be a good collab, just that title is kinda weird imo.
Lol if you don't want a "Realistic" Rig then parent like 3/4 Cubes to some characters arm (Scale them ofc) and make them grey and you can animate them going in and out ( ͡° ͜ʖ ͡°)