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Old 09-20-2018, 10:05 AM
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black88is black88is is offline
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Default K frame rear sights

I would to know if all k frame sights are the same. I have a model 15 that has a sight on it that does not align properly to the screw holes in the frame.
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Old 09-20-2018, 10:12 AM
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No, they are all the same width, but the location of the mounting screw has varied some. I think it went from behind the forcing cone to over the top of it or vis a versa. Then the newer ones have a rounded front.

Some sellers on ebay post diamentions or photos with a measure.

I would NOT tap a new hole. I have taped several that I converted from fixed to adjustable. Its a pretty small tap. Something like a 5-40 0r maybe even a 3 I can't remember of the top of my head. Takes a good set up and a lot of care.
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Old 09-20-2018, 10:30 AM
Protocall_Design Protocall_Design is offline
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All the new rounded end ones are the same. The old square ended ones vary quite a bit on hole location, depending on what model of gun they were for. The square sights had a small screw, I think #2-56, not positive. They used the same screw for the adjustable trigger stop that was in a slot in the frame. The round sights have a larger screw.
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Old 09-20-2018, 10:43 AM
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In addition to the variable screw hole location and leaf style, the “slide” (sight blade) height differed, and the metal used (blued, stainless).
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Old 09-20-2018, 11:01 AM
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This is on a model 15-3, the work was poorly done and probably the wrong sight. Thanks for all replies.
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Old 09-20-2018, 01:17 PM
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Not counting the round front tang sight, there are 4 K frame sights:

1. Pre 1967 - the front tang screw aligned with the barrel cyl gap.
2. the 2" barrel sight with tang that reaches all the way to the barrel, same screw location as #1 above.
3. 1967 - Relocation of rear sight front tang screw forward over the top of the barrel which added the -3: 14-3, 15-3, 17-3, 18-3, etc.
4. the 2" barrel sight with tang that reaches all the way to the barrel, same screw location as #3 above.
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