CycloneShock Shotgun Cylinder and Swapper Bit

For your Nerf Mega CycloneShock.
(NOTE: WILL NOT WORK ON A ROTOFURY. I may make one, but only if I get a rotofury, and I have no idea when that will be.)
I've got the manual I made somewhere around here...
Well, in lieu of that, I'll just say stuff here. Probably better that way.
Print any way you like, it might need some tweaking to get barrel fit right, I recommend printing small sections (by stopping the printer a while into the print) and testing. Infill not critical on the cylin