So today I was replacing my trigger rebound spring in my 1985 M29. I found this small pin about .75” long inside the spring. I’ve never seen this spring in any of my other S&W’s or on any forum pictures for that matter. What is this pin for, and is it needed with the new 14lb spring I installed?
Trigger Rebound Spring
- Thread starter JBTJ
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Trigger overtravel stop.
Is it needed to work properly?
Protocall_Design
Member
That pin is in lots of guns. It is supposedly an internal trigger stop. In reality, it's too short to do anything useful. It's not needed at all. I just toss those.
If you did want a functional trigger stop of that type, you would have to start with a longer piece and carefully work it down to exactly the right length. We are talking plus or minus .002" or less. It's a finicky thing to get just right.
If you did want a functional trigger stop of that type, you would have to start with a longer piece and carefully work it down to exactly the right length. We are talking plus or minus .002" or less. It's a finicky thing to get just right.
No, not required. Overall function remains the same without it.
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Thanks, I wasn't paying attention when I removed it. But apparently one end is rounded off and the other is flat. Which end goes into the rebound slide first? I want to reinstall it.
Protocall_Design
Member
The rounded end goes in first so the flat end goes against the pin that keeps the spring in place.
Cardboard_killer
Member
The rounded end goes into the slide.
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This Pin takes the place of the screw in style that mounts in the Frame behind the Trigger. Same function but easier and cheaper to make. Like others above have said, not necessary and barely perceptible anyway.
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the round end goes into the rebound slide first -because the bottom of the hole is cone shaped from drilling .The flat end in first would cause the pin to be too long and would jam the action.I find that this a classic way to have a trigger stop but usually has to be carefully hand fitted. Keep dressing the flat end and trying until the trigger just breaks from the hammer sear
Thank you. That pin has been in the gun since new 1980 I believe.
I just replaced the spring, and didn't pay attention to which way the pin came out.
Thanks for everyone's help.
orthoman
Member
the flat end is best against the pin. the best video says "Bury the modified end"
You learn something new every day (hopefully).
My Model 14 has a trigger overtravel stop visible at the back of the trigger guard. My Model 19 has a slot there, presumably for the same thing, but w/o the stop, probably because it wasn't felt necessary on that model.
My Model 14 has a trigger overtravel stop visible at the back of the trigger guard. My Model 19 has a slot there, presumably for the same thing, but w/o the stop, probably because it wasn't felt necessary on that model.
Only if you want a trigger stop to prevent overtravel.
Although it's true that these pins do not very accurately eliminate 'all' overtravel as they come. So they actually work better when installed backwards. Because in affect, it lengthens the pin slightly by having the flat end nested in the cup shaped hole. If the trigger will not release the hammer, (seldom a problem) just knock the sharp edge off of the flat end of the pin so it'll nest slightly deeper in the cupped hole.
Or someone removed it. It was common on the older target models. Many didn't realize it's adjustable with its retaining screw.
I read somewhere (possibly on this forum) that the Model 14 was specially fitted and tuned at the factory and so received TLC that was not lavished the other K-frames, which is why I figured maybe the 19 wasn't fitted with an overtravel stop, even though the frame was inletted for one.
I've had my Model 19-4 apart and done a fair bit of polishing - the rebound slide esp. was surprisingly rough, as was the frame where it rubs - and installed trigger & hammer shims, but although the trigger pull is pretty darned good, it can't match my 14-3, which is simply superb. (Mind you, I'm not a professional gunsmith!)
My 19-1 Combat Magnum (4") has the trigger stop. Also the target hammer and trigger, and target stocks. That's the way it came.
Each of those items may have been individual options on the 4" 19 and it was ordered that way.
But if the revolver has the slot behind the trigger, it also has the threaded hole inside so the trig stop can be added.
Each of those items may have been individual options on the 4" 19 and it was ordered that way.
But if the revolver has the slot behind the trigger, it also has the threaded hole inside so the trig stop can be added.
Thanks for the info. Mine's a 6" (3T) so it most likely had one installed, too. Maybe I should look into putting one back in if they're still available.
