I like how you regurgitate things that we taught you, while acting as if you're a veteran expert and we're a bunch of idiots...
In this very thread, as well as one of your others within the last year, we had to point out
to you that the .327 LCRs use a steel frame.
Yes, you are correct that I missed the 3-inch specification. But your comment about reading comprehension, and the tone of your Yankee Ebonics interpretation was uncalled for.
As for the engineering...
How much work do you think it actually takes?
For an existing 3D-modeled design which uses an investment-cast frame and a barrel liner, it can, literally, be a 5 minute job. Slice the model. Stretch the frame and liner 1-3/8". Run an integrity check. Run a stress simulation. Save the file. Done. Send it off to the CNC department (where they'll generate tool paths, etc.) to make up the molds for the foundry, and send the new specs off to the barrel supplier for liners.
It's only another 10-15 minutes worth of work to take existing geometry for the .38 Special and rimfire models' adjustable sights, and integrate it into the stretched .327/.357 LCRx frame.
I work with CAD and 3D modeling almost every day, and send 2D or 3D files out for 3D printing, manual machining, CNC machining, or investment casting on a weekly basis. And they're primarily gun parts, tools for guns, tools for customizing or modifying guns, or jigs for building gun parts.
I don't have professional training, or do it for a living. It's a hobby. Yet, even as an 'advanced novice', it would be an easy job.
If you don't know what you're talking about, don't try.