Is this revolving carbine thing any good?

[North Country Gal]

forty, I assume you are using a conversion cylinder to shoot 45 Colt, right? If so, my research on using conversion cylinders to shoot cartridges in a BP revolver is that the ATF still considers it to be a BP revolver as long as you have to remove the cylinder every time to reload. Only if you do a permanent mod that allows you to reload without removing the conversion cylinder, such as cutting a loading gate does the revolver become a regular revolver and under ATF regs. Pretty sure, then, that as long as your revolver carbine keeps its status as a BP rifle, you could cut the barrel all you want.

This is my take on it, BUT I could be wrong, so do due diligence before proceeding.