it would be neat if in the move editor, you could select where extra equipment would be stored on your persons.
the item would be static (locked in place, no physics), and have their damage modifiers turned off to avoid hitting/cutting yourself/ people making cheese movesets covered in blades that just run at you
The player would have to move their hand over the grip and hold it for X ammount of seconds or something for it to detach and become a physics weapon again