It's not commonly used. I'd imagine most people know it but for those that don't I could understand the confusion and concern.

I know the word and its meaning and my initial reaction was negative because I thought "this has very little metaphorical value for a physics engine." You think of kinesis, movement, reactions. "Box" makes sense because it's a physical constraint with coming and interesting physics effects across its physics. Rapier is - to me - just an inanimate object.

But imagine you don't know the word. It could be jarring. And unlike words evoked by a sibling reply (paper, rap, etc) it's not nearly as commonly known or used.