Board Thread:Off Topic/@comment-25857155-20151110093941/@comment-26397825-20151119025756

Depends on the user. Penny utilises strings (and I'm guessing either her semblance or magnetic fields generated by the fact that she is a robot to assist with th levitation part of her weapon) to manipulate her swords. A normal person would be able to use two weapons in their hands, and possibly a blade or gun on each legs, which is a total of four. Someone with Telekinesis like Glynda could manipulate as many weapons as they can comfortably control.

Basically, as many as you like, but it has to make sense rather than just being 'for the coolness of it'.