What Part Is This?

SixgunFife

SixgunFife

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Included in a small sealed baggie with a new-to-me S&W 28-2 was the small part and spring shown. What is this?

Frankly, I’d dismissed it (but didn’t discard it) until the gun skipped a chamber maybe 6-7 times during the 140-plus-round initial range visit recently. I’m suspecting a weak cylinder stop spring, but that is only based on a quick Google search on the “skipping chamber” topic. I realize there may well be zero connection between this item and the skipping.

Any assistance is appreciated. Pic of the gun included for fun…

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As a sidebar - yes, it’s a 28-2 that’s been equipped with a target trigger and hammer, a yellow front sight insert, and what appears to be a refinish. Other than the skipping, the gun shot exceptionally well.
 
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The part is the cylinder stop. Was the gun reassembled without it? Is there anything engaging the cylinder notches? If it was omitted, that could be your problem. It does take a bit of finesse to get back in place.
 
Thank you both and there is a visible part as shown; the cylinder notches are being engaged by this.

1746588529970.jpeg


I’ve not had the side plate of the gun off; honestly, I’ve never removed that plate (though I always remove the whole cylinder assembly for cleaning).
 
The part is the cylinder stop and, probably, it's spring. Since your photo shows there is a cylinder stop in the gun it was probably replaced and the old one was in the bag. Unless you want there is no reason to remove the sideplate to see if everything is correct inside.
 
Cylinder stop is not engaging the notch properly. For one, you can see a burred edge on the stop in your photo. It would be interesting if it skips on the same chambers. Take a close look at the notches in the cylinder. If I had the gun, I would start by removing the stop, remove the burrs and check to see how the stop fits into each notch. There may be burrs there as well.
 
-BTM- said:
My powers of deduction say you have an “new” oversized stop in there that wasn’t fitted 100%.

When you say it skipped a chamber, what does that mean in detail?
Click to expand...

Maybe 50-ish or so rounds into the range session, I’d reloaded and fired the first round and could hear / feel something “different” about the gun. Like an extra “click” from the cylinder. Kept firing, eventually encountered the now-spent cartridges until coming back around to the round that had been missed.
 
You need to locate which chambers are being "skipped" and insure the cylinder stop will fit those notches by width and depth. As others have said it appears to be a new stop and may be to wide for those particular chambers and needs dressed. It looks to have plenty of protrusion above the frame window surface but if not enough for those chambers you will need to file the flat on the stop just behind the hump. While your at it looks like the edge needs to be broken on the left hand side of the stop to match cylinder direction of rotation into the bottom of the "T". These are all very minute adjustments so go slowly with changes. Also check the notches on those chambers for damage.
 
Krogen said:
The part is the cylinder stop. Was the gun reassembled without it? Is there anything engaging the cylinder notches? If it was omitted, that could be your problem. It does take a bit of finesse to get back in place.
Click to expand...
A bit of an understatement. Positioning that little mousetrap spring, and keeping it in the proper position (and not kinked) as the stop is lowered into the frame, takes a bit of attention and patience the first time. ;)
 
Last edited:
Let an experienced smith check the throw-by (skipping charge holes) and correct whatever requires correction. :) Nice revolver. It deserves the attention of a smith so it gives you the reliable service both you and the revolver deserve. ;)
 
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