It takes a lot more resourcefulness to get a body bomb than to amble across town and buy a gun using your Master Card.
Regarding using a chainsaw, its hard to kill 32 people in 60 seconds using a chainsaw.
(Obvious points, why should it be necessary to even make them.)
So you think he couldn’t have actually *planned* something else without a gun? Have you not seen the instructions on the web for making bombs? You obviously have no grasp of the reality that is Cho’s psychopathic intent.
No, it doesn’t. Gasoline and an ignition system is cheaper.