I Want One

You know, the law covers firearms, pnuematic guns, knives, throwing stars, street sweepers, sawed off shotguns, and machine guns, but I don't think there is anything in the law forbidding me from walking down the street with a Gatling Style Slingshot Crossbow:

If you look at this guy's vids, he also has a semi-gatling style hand version. However, it doesn't have a triggering mechanism like the crossbow version.