Bart, mine did not come with a c&b cylinder, and although they advertise coming with two, I think it's hard to get one like that from all I've read, you might want to call Tayor & company and ask about that. Here is the deal on that. The cartridge cylinder in 45 colt is shorter and fatter than the C&B cylinder, and the hand assembly for the 45 colt is longer than the hand for the longer slimmer c&b cylinder. To change from the 45 colt cylinder you would remove the backplate, then install the longer c&b cylinder, and I think each time you did this you would need to tear it down to install the shorter hand which would be timed for the c&b. To have one hand that would work in both cylinders would be quite a feat I think? I think they advertise both, but from what I've read they found out it was quite a deal to actually produce them this way. I'm sure you can set up for both cylinders though, to do this I would simply order the c&B cylinder, the shorter 1858 c&b hand assembly, and then time it, or have it timed. I would ask Taylor's how this works, and ask them about the difference in hand assemblies and the different size cylinders and see what they have to say, or offer. I have a feeling they would do the work there.