The law refers to more than one shot on a single pressure on the trigger.
The crank is deemed to be the trigger.
Doesn't matter how many times you wind the crank - if more than one shot is fired, it is a prohib.
I am not sure how true that definition would be if the crank is not free turning. On a conventional gatling there is no trigger, the strike is cammed back and released during the unimpeded rotation. My thought was to make it so that the crank could not rotate a full turn but rather had to stop for every barrel and a single true trigger used to fire successively all barrels one at a time as each barrel stops over it. A true gatling does not have sears while my thought was that each barrel would have a sear so that turning the crank with out pulling the trigger would result only in loaded barrels rotating but not firing. Firing the gun would prevent the barrels rotating until the trigger was released
cheers mooncoon