The Firing Line Forums

Go Back   The Firing Line Forums > Hogan's Alley > Handguns: The Revolver Forum

Reply
 
Thread Tools
Old October 28, 2009, 03:31 PM   #1
walnut1704
Junior Member
 
Join Date: October 28, 2009
Posts: 2
Smith & Wesson rear sight assembly

I have an older Model 66-2 (1983 I believe) that's missing the entire rear sight assembly. It's the old style with the square tang.

These are hard to find. Brownell's told me I need a ".146" (which they don't have). They do have a ".160" in the "old style" for the 586/686. They also list other sizes for the Mod. 17, 15, etc.

Are these really different for each K-frame? Or is it just the blade that's different? What does that measuremnt refer too?

If anybody has a source for either an original or replacement (such as a Millett) I'd appreciate any information. I'm at my wit's end and about to drill it for a red dot, but I'd like to keep it old school, like me.
walnut1704 is offline  
Old October 28, 2009, 03:52 PM   #2
carguychris
Senior Member
 
Join Date: October 20, 2007
Location: Richardson, TX
Posts: 5,501
The measurement simply refers to the height of the rear sight blade. Using the general rule-of-thumb, you move the rear sight in the direction you want the POI to move; therefore, a taller rear sight blade will move the POI upwards.

S&W determines which front and rear sight combination will result in the revolver shooting to POA at an assumed range (usually 10-25yds) using an assumed "usual" cartridge load, while still allowing the shooter to adjust the POI within a reasonable range. A too-tall rear sight blade will make your revolver shoot too high; a too-short rear sight blade will make it shoot too low unless the elevation nut is cranked upwards to an unreasonable degree. If you loosen the elevation nut too far, the sight base will spring off, usually resulting in the loss of the nut and/or washer in the process.

The sight blades are relatively easy to replace once you have the base you need. AFAIK all modern (i.e. postwar) K/L/N frame sight assemblies use the same basic blades. S&W offers 0.126", 0.146", 0.160", and 0.196" blades with and without white outlines. You need the "kit" including the windage screw and nut because you must break off the screw inside the nut to remove the blade. I recommend the S&W installation tool kit, which consists of the special 2-prong screwdriver attachment you need to install the nut, and a punch to stake the screw to the nut once the blade is in place. I also recommend buying a spare sight plunger and spring, since these parts are absolutely miniscule and tend to go flying when the screw is removed. I recommend performing disassembly inside a plastic Ziploc bag to contain them.

In addition to Brownell's, you can get the parts here:

http://www.intlmidway.com/intl/ebrow...+***+15917+***

And here:

http://www.smith-wesson.com/webapp/w...Id=16204&top=Y
__________________
"Smokey, this is not 'Nam. This is bowling. There are rules... MARK IT ZERO!!" - Walter Sobchak
carguychris is offline  
Old October 28, 2009, 06:42 PM   #3
spacecoast
Senior Member
 
Join Date: October 14, 2009
Location: Sunshine and Keystone States
Posts: 4,114
I bought the kit for my 686 directly from S&W, it was about a buck less than Brownell's (didn't compare shipping) and showed up a few days later.

http://www.smith-wesson.com/webapp/w...arkForDelete=0

The tools are helpful, I'm sure, but not mandatory - with Carguychris's assistance I managed to finish setting the windage screw end with a punch

Last edited by spacecoast; October 28, 2009 at 06:44 PM. Reason: URL fix
spacecoast is offline  
Old October 28, 2009, 09:36 PM   #4
walnut1704
Junior Member
 
Join Date: October 28, 2009
Posts: 2
Thanks

I'll order one and order a .146 blade. Once upon a time I replaced a sight blade. I don't recall it being a big deal but I think I had to make a tool.

Thanks for the help.
walnut1704 is offline  
Old October 29, 2009, 05:51 PM   #5
glock199mm
Senior Member
 
Join Date: November 6, 2007
Location: louisiana
Posts: 225
call smith and wesson i just got a old syle n frame rear sight assembly from them for $63 dollars shipped
glock199mm is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:47 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06738 seconds with 7 queries