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All of the sights are pinned on. Here is the 617-1. I used only 1 pin here.
I cut the sight off the 6 in. barrel, flipped it upside down in the end mill & machined a tenon on the bottom of the base, ala S&W. Then use a slot or keyway cutter to machine a slot for the tenon in the top of the barrel rib.
This 19-7 has 2 pins holding a factory S&W sight on, the way S&W did it in the 50's & 60's. The pins were left "proud" so you can see "em. Not to be mistaken for a factory gun.
The 681 has a pinned night sight available from Brownells for multiple applications.
Ebay is a good source for donor barrels, as well as original S&W sights from time to time. Also Numrich comes up with some NOS old stuff every now & then.
This factory pre-27 barrel has an example of "proud" pins.
This barrel has an example of not proud pins. You can barely see them as they have been blended in.
Hope this helps.
Ned
I cut the sight off the 6 in. barrel, flipped it upside down in the end mill & machined a tenon on the bottom of the base, ala S&W. Then use a slot or keyway cutter to machine a slot for the tenon in the top of the barrel rib.



This 19-7 has 2 pins holding a factory S&W sight on, the way S&W did it in the 50's & 60's. The pins were left "proud" so you can see "em. Not to be mistaken for a factory gun.

The 681 has a pinned night sight available from Brownells for multiple applications.

Ebay is a good source for donor barrels, as well as original S&W sights from time to time. Also Numrich comes up with some NOS old stuff every now & then.
This factory pre-27 barrel has an example of "proud" pins.

This barrel has an example of not proud pins. You can barely see them as they have been blended in.

Hope this helps.
Ned