I guess it depends upon what the definition of a "Frankengun" is.
I have found that the Pietta 1851 Navy .36 CNC (~2002-present date) revolvers are very conducive to parts swapping with little to no fitting. Be forewarned that the pre-CNC Pietta 1851 Navy revolvers have different internal dimensions than the CNC guns, thus the bolt, hand, trigger, et al are different. There are also at least three different 3-piece (backstrap, trigger guard, wood) grip assemblies which I term the Small Tail [AZ/1990 (or before) through BP/2001], the Large Tail (BS/2002 through CM/2014), and the Non Tail (CN/2015 through present). They will interchange as a 3-piece assembly to any Pietta 1851 Navy frame (and usually the 1860 Army/1861 Navy), but the parts will not interchange among the assemblies. Clear as mud? If you want to delve deeper I can create a thread about this as I have done previously on another forum.
I would definitely take J.B./J dirt up on his offer. One used to find them on Ebay when new(er) revolvers were available for folks to buy a revolver, part it out, and sell the various parts at (usually) inflated prices. I have always gone to VTI
Welcome to VTI Replica Gun Parts - VTIGunparts.com Online Store for parts and they are good folks. However, due to the pandemic in Italy I have no idea what their stocks are like.
Insofar as my Frankenguns, they are not outlandish but are not something that Pietta ever marketed.
My 1851 Navy .36 2nd Model Belt Dragoon (which is not historical, nor was it ever produced by Pietta). It started life as a Pietta 1851 Navy .36 CM/2014. It had ugly dark straight-grained quarter-sawn walnut wood, which I replaced with a figured piece of European hardwood grip I found on Ebay. I then ordered the smooth/plain/non-engraved cylinder and the part round/part octagon barrel from VTI (which are stock items from the Pietta Griswold & Gunnison). I used the load-lever/rammer assembly from the original barrel. I found a squareback trigger guard from VTI that fit the Large Tail configuration. It even has a factory color case trigger which I dare someone to find these days.
Anyone got one like it? Then I guess it is a Frankengun.
Regards,
Jim