Dicks had a meltdown, for good reason.

[Brian37]

Yes they did. The products they sold to scrap metal companies were specifically designed for high and rapid output with a hair trigger pull on a trigger.

But that's not a 'spray weapon'.  You're thinking of automatic weapons.  Dick's didn't stock those.

Boru

edit:  Yeah, what Anomalocaris said (I was ninja'd)

Come on Boru, 

I am sick of the hair splitting of "models". Many firearms can be modified to create rapid output. 

And regardless of model, riffle or handgun, the best prevention is better vetting at time of sale, rather than reacting to violence after the buy.