686 No Dash Modification

Sunkist

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What exactly is done to a no-dash to earn the M stamp. I heard it's a primer flow problem caused by the firing pin bushing. What does the factory do to it?

Secondly, in one of my 686's the hammer has a bit of free play and moves from the left to the right as it drops into place. Everything works fine but I'm thinking about a hammer post shim to tighten it up. The hammer is solid in position whether at rest or full cock but the movement is seen as it drops. This gun is also an unmodified no-dash.
 
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What exactly is done to a no-dash to earn the M stamp. I heard it's a primer flow problem caused by the firing pin bushing. What does the factory do to it?

Secondly, in one of my 686's the hammer has a bit of free play and moves from the left to the right as it drops into place. Everything works fine but I'm thinking about a hammer post shim to tighten it up. The hammer is solid in position whether at rest or full cock but the movement is seen as it drops. This gun is also an unmodified no-dash.
 
The 686 modified had the hammer nose bushing replaced. As far as your hammer wiggle that appears to be normal for my 686. As long as it is not hitting the sides of the frame it should be ok. Bruce
 
Yeah, I checked for drag marks on the hammer and it looks normal. I'll go back to Kuhnhausen to read up on the hammer nose bushing. I've not shot one of the no-dash yet but my other handles any load with no signs of trouble. Thanks for the info.
Originally posted by Bruce Lee M:
The 686 modified had the hammer nose bushing replaced. As far as your hammer wiggle that appears to be normal for my 686. As long as it is not hitting the sides of the frame it should be ok. Bruce
 
I have a 686 no dash and it doesn't have an "M" stamped anywhere. Where is the "M" suppose to be stamped? If its not there do I just call S&W and have them ship a box w/label to me?
 
The M is stamped between the serial number and the Model number. As I understand it S&W will send a shipping label and pay shipping both ways because there was a recall on the fix. I hope that helps.

Sunkist
 

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