Just me resisting the practical answer, nothing more. $200 for an unproven, tracticool add-on that is now a famous movie prop.
But I don't like every comment from a striker 9 thread to be practical. It doesn' always have to survive every youpube test, or be used by special forces.
I am seriously thinking about grabbing one myself because it looks cool, even if impractical. Or at least I am betting it is. If it actually works as advertised I will be pleasantly surprised.