629 frame part

[tdan]

While cleaning a 629-4 today, I was curious about a small part that I have only seen in 629's. This part is never shown on diagrams, and I don't know the name of it.

This part is a small flat piece that rides in a vertical slot milled into the left side of the frame. The pin that secures the hand to the trigger rides in a groove on this part. This part is carried upward with the hand when the trigger moves backward. Does anyone know the name of this part and it's specific function? Smith leaves this part out on the 625, the 610, and perhaps other N-frames. If the gun was not back together, I'd post a pic........but I'm sure someone knows exactly what I am talking about. I suspect this part may have something to do with the "endurance package" engineering upgrade.

 

[VM]

tdan - there's a fuzzy warm feeling in the back of my brain that there may be mention of it in the FAQ's

 

[tdan]

I see a pic of this part(second pic down, bottom center) in the FAQ sticky regarding removal of the internal lock. How about simply explaining what you know about this part?.............Thanks!

 

[tomcatt51]

I don't know how long it was used but it was meant to help keep the cyl release from releasing under recoil.

 

[robertrwalsh]

What tomcatt said. S&W found that some of the magnum revolvers under heavy recoil would, on occasion, unlock the cylinder latch due to inertia. that little doohicky prevents that from happening.

 

[500 Magnum Nut]

It's called the bolt block

You can see the slot in this picture of a 500 mag.