Last year June or so, I undertook to modify an S & W Model 10-6, 4 inch Bull Barrel, Square Butt, to be a 3 inch Barrel, Round Butt, Bobbed Hammer, and, to do the Barrel shortening, I simply cut off an inch or so of the Barrel with a Hack Saw, then tidied things up and made and soldered on a new 'Half Round' Front Sight.
In doing so, my cut was just barely onto the rearmost portion of the riginal front Sight.
It was then that I realized the front Sight was an interference 'Press Fit'.
I had assumed previously, that it was integral with the Barrel Forging and had been Machined to form, rather than that it was a seperate entity.
I was able to pry out the Front Sight from the inch of Sawn-off Barrel, and to examine the aperature it was pressed into.
There was no trace of Solder or adhesive.
By looking at these, one would assume the Front Sight was part of the Barrel Forging, and, merely machined to form, but, this is not so.
Wheter some were a press fit, and, others, intregal with the Barrel Forging itself, or whether all were press fit, I do not know.
Bear in mind please, I am only addressing the Bull Barrel Model 10, Model 13, and probably also the Model 58, and no high-ribbed or pencil Barrel ones.