5. The Kendo Stick
No longer reserved for hardcore matches only, the kendo stick is a great weapon with a distinctive sound that makes a huge impact.
The reason this weapon is so good has to do with the fact that, unlike the roll of quarters, it can be tossed onto the floor, or thrown up under the ring, without the ref ever having known it had been used.
Yes, the pop of the stick is loud, but with enough of a distraction, and crowd noise to drown it out, the official would likely not hear it in the first place.
Of course, if it is a match that involves weapons, the ref wouldn't be a factor, anyway, so it's batter up.