SQLGeek wrote:
All calibers at the same time, that'd be an interesting looking gun. Where can I buy one? Does Crimson Trace make grips for it?

Well, I wasn't considering all calibers in the SAME GUN at the same time, but if that's the way you want to swing, here's a start for you.
A Nock Volley gun has 7 barrels (count 'em!), and fires all seven at the same time. It is chambered in .52 caliber, and is perhaps a bit long and heavy for concealed carry, but if you could cut one down to reduce the weight and length, then change out the barrels for various calibers, you'd come close. Imagine firing 7 rounds, all different calibers at the same time. That would certainly puzzle the CSI guys!
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