I hope you all do not think I am hijacking this thread, but I would like to interject a few things since we are talking Pietta.
Hewy, you got one of the more "classic" backstrap/trigger guard/grip models that Pietta seems to producing these days. I have a 2015 [CN] G&G that has that profile.
But that G&G presents a bit of a problem when it comes to interchanging parts with the previous Pietta 1851 Navies.
In addition to my new G&G, I have a Pietta 1851 Navy that has the proverbial "tail" (2014 [CM]) date. I like it as far as shooting it (think of the 1911 Government model with the flat mainspring housing vs the 1911A1 with the arched mainspring housing).
The older Piettas may not be historically correct (that is a given), but different shooters have different requirements. (I also have a Pietta squareback TG for variations.)
I am posting this insofar as trying to show the differences between the Pietta "tail" guns and the newer Pietta models such as the G&G backstrap and TG.
These are pics of my spare parts, assembled to show the difference between the Pietta 1851 Navy parts insofar as the interchangeability with the Pietta G&G.
Do not fret about the rattlesnakes. The original wood for the Pietta Navy was used for this experiment, and the grip lines are original Pietta "tail", for reference.
The first 2 pics are of a Pietta 1851 Navy TG with a Pietta G&G backstrap, with a divot for a shoulder stock, which never happened, historically. I replaced my G&G backstrap with one having no cut on the backstrap bottom for any shoulder stock (from VTI).
The next two pics are presented to illustrate the difference between the TG, the backstrap, and the grip when comparing the previous Pietta Navies and the Pietta G&G.
Sorry for the snakes, but I am a big Eastwood fan. The wood is from my original Pietta 1851 Navy. Just for comparison.
My G&G is currently having the wood refinished and I must wait at least three days before any steel wool to make it presentable.