Smith Wesson lockwork help/expertise wanted

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Schofield3

Schofield3

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Hoping to solicit some knowledge on S&W lockwork! I have a model 66 as pictured, and it jammed!! which I never thought could/would happen – upon carefully opening it and investigating the mechanics I found a small screw and tiny plate with a threaded hole in the middle of it (as seen in photos) – this came loose to some degree while at the range and completely locked up the revolver, partially leaving the hammer blocking the cylinder release even……….. so after comparing the 66 with a model 19 of mine this screw/plate is not present at all in the model 19 although there is a hole where it could locate. What is this screw and do I even need it for normal operations with the revolver?

Thanks guys!!!

WHAT IS THIS SCREW???
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Schofield3 said:
I have a model 66 as pictured, and it jammed!!
Click to expand...

Impossible. You must be mistaken. It's a revolver, so they're incapable of jamming and are always "6 fer sure". We're told as much on these forums, too, so it must be true. ;)

Seriously, glad you got it figured out. As rcmodel indicated, they're more hassle than they're worth, which is partly why S&W stopped putting them in (at least in that form).
 
The screw in trigger stop is a feature of S&W K-target revolvers.
Police departments wanting adjustable sights learned to take them out a long time ago.

N-frame guns had a rod inside the rebound spring. Not much to go wrong, but it would take a lot of fitting to get it right and most have little if any effect on the trigger pull.
 
Smith had a recall or advisory back in the 80's to remove these over travel blocks for this very reason. Yours was missed in that program.
I did not realize that was the purpose of the rod in the N frame rebound spring. Thanks for that piece of information.
 
IIRC, S&W never put those in their "service" revolvers; they went along with target sights, target triggers and target hammers. Still, they gave enough trouble that many folks removed them. They went to the new system (pin inside the rebound slide spring) but for a while they continued to provide the cuts in the frame if the customer wanted to install the trigger stop. (My K-22 and K-38 have them; my other S&Ws do not.)

Jim
 
That depends on what you term a "service" revolver. I have an old 19, made about '59 or '60 that I carried for way over twenty years that was fitted with the stop depicted. In my estimation probably 95% plus of the LEO's I knew carried S&W products fitted with those stops.

In the early or mid 70's, after several reports of malfunction, S&W notified police agencies nationwide of the issue and supplied free replacement stops that could not loosen and stop the revolver's function.

Personally I never saw or heard of an incident in over 30 plus years as a PO but the possibility was there.
 
In a fair number of years as a gunsmith, I encountered that problem many times, and took out a lot of those stops. The idea was OK, but there were two problems, first that the settings wouldn't hold, and second that adjustment required removing the side plate, not a good idea unless something needs repair.

Some gunsmiths drilled the trigger for a set screw to make a screw-adjustable stop, which was OK. Some also drilled the trigger guard (has to be done at an angle). Other tricks involved a dab of weld that could be filed down to the right point, and gluing in a piece of brass or steel.

Jim
 
We removed them from every duty revolver. Didn't want the trigger to get jammed.
 
I removed them at the customer request, though with service guns I might "recommend" removal if the customer reported having any trouble.

In a few cases, I made new ones that fitted the slot with no movement and were held in place with the screw. I then filed the exposed part until I got perfect letoff with no backlash.

Jim
 
If you just gotta have a trigger stop?

I still like the 'fitted' steel drill-rod with beveled ends inside the rebound slide spring.

Done properly, there is just no logical way they can fail.

rc
 
That was a lot quicker and cheaper, of course. Trouble was that I didn't think of it!

Jim
 
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