Many, but not all, American made guns, got very little "upgrade" where it counts. When it comes to all but the very highest of grades offered. At least from what I've seen, often times the locks had no extra fit or finish. The grade differences were all on the outside.
This brings up the question I was going to ask.
How many of these "up graded" guns pictured, have had the internal works brought up a level or two?
Jim