The only revolving rifles I have seen are based on the Remmington design. I have heard the same rumors about the Colt 1855 model. I have seen several threads on couple of Civil War sites I lurk on. What I know is that Palmetto makes a Colt Root Revolver in .32, sold exclussively through Dixie gunworks. When the .32 was released, Palmetto representatives were telling people at the CAS convention in Vegas that a .36 model would follow as well as a musket in .44. I heard this from a friend who heard it directly from the Palmetto table. I do know that the root revolver is not getting rave reviews, so if you are really interested, I would contact Dixie and see what they say or Palmetto directly. I am interested as well, but would probably prefer to see it released as a Carbine version, like what the Texas Rangers carried. Shorter length, so you are less inclined to put your hand forward of the cylinder, ouch.