Anyone know how the brass and steel are joined when constructing a front sight like one of these?

https://www.worthpoint.com/worthopedia/marble-sheard-winchester-1873-73-135550379

Any insights into how the brass is joined to the steel would be appreciated. I think these are very elegant, and I can't figure out how the connection is made. At first I thought they were soldered together, but the bluing extends right up to and flush with the brass. I wouldn't think that is possible with solder.


My bolt rifle has a front sight in the style of 1903 Springfield, in other words a tall ramp that holds a simple blade. I'd like to build a blade with a brass or gold bead like this one:

http://www.finegunmaking.com/page32/page46/page46.html

That has put me on the quest to learn how these front sights are constructed. Any input is appreciated!