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Have been thinking about this model for some time, having owned the two in this post for over 18 years (bought the 4” in 2000, the 3” came to me in 2004). Always thought they were neat, but now I’m thinking they are fairly rare in the overall scheme of things.
When I first did my limited research, this model was described to me as the “next engineering change” of the CS-1 (more on that later), and that it was left in the line for procurement by other law enforcement departments.
In the Factory letter I have on the 4” gun, it states that the CS-3 was an “over-run” gun of the Customs Service models. This is curious as this model differs from the original CS-1 specification, in that the width of the front sight of the CS-1 was specified as 1/10” wide, while the width of the CS-3 models is of the more standard S&W 1/8” width used on their modern revolvers.
I wouldn’t think the Customs Service would allow any new procurement or replacement for one of their revolvers that would differ from the original spec.
As with later engineering changes in the standard M686 line (the M686-4 specifically), the extractor of the CS-3 is rectangular in shape (rather than round), which is a result of this being made using CNC machining. Now, more curious info, the factory letter for the CS-3 below starts with it saying it is a M686-3 (?), while the guns themselves are just marked M686. This is interesting as the move to CNC machining didn't start with the regular M686 line until the -4 engineering change..... (hmmmm??)
So, aside from the two differences of the CS-3 to the earlier CS-1 models, the visual side of this may lead one to think it was a standard production model with bead blasted finish (?).
Now, here’s one of my questions, has anyone else seen or heard of the CS-3, specifically of any that were procured by and/or used by other law enforcement agencies??
The factory letter I have included is for the 4” gun, I have not lettered the 3” primarily as (see the pics) it is marked on the side plate as “.357 Security Special”, which is notable as export models shipped to the S&W's distributor in Germany (Wischo) were so marked. My notes indicate that it shipped on 10-24-91. This gun came to me from another forum member, and from my recollection he acquired it in Europe and was able to bring it back to the US, my recollection was that he was a service member stationed over there. Maybe one day I’ll letter it, depending on how scarce these guns may turn out to be.
Looking for feedback and info if anyone has one of these CS-3 revolvers.
Most of my pics will show these two wearing factory magna grips (my assumption is that they would have shipped that way), but it would not be one of my pictorials unless I dressed them properly with Spegel boot grips, Gratuious pic added below
.
Also note that both of these are sporting a Patridge front sight, that’s how I like em, they originally had the standard ramp front sight used on modern Smith revolvers.
Would love to hear about your CS-3 models.....
Enjoy and thanks for looking.
When I first did my limited research, this model was described to me as the “next engineering change” of the CS-1 (more on that later), and that it was left in the line for procurement by other law enforcement departments.
In the Factory letter I have on the 4” gun, it states that the CS-3 was an “over-run” gun of the Customs Service models. This is curious as this model differs from the original CS-1 specification, in that the width of the front sight of the CS-1 was specified as 1/10” wide, while the width of the CS-3 models is of the more standard S&W 1/8” width used on their modern revolvers.
I wouldn’t think the Customs Service would allow any new procurement or replacement for one of their revolvers that would differ from the original spec.
As with later engineering changes in the standard M686 line (the M686-4 specifically), the extractor of the CS-3 is rectangular in shape (rather than round), which is a result of this being made using CNC machining. Now, more curious info, the factory letter for the CS-3 below starts with it saying it is a M686-3 (?), while the guns themselves are just marked M686. This is interesting as the move to CNC machining didn't start with the regular M686 line until the -4 engineering change..... (hmmmm??)
So, aside from the two differences of the CS-3 to the earlier CS-1 models, the visual side of this may lead one to think it was a standard production model with bead blasted finish (?).
Now, here’s one of my questions, has anyone else seen or heard of the CS-3, specifically of any that were procured by and/or used by other law enforcement agencies??
The factory letter I have included is for the 4” gun, I have not lettered the 3” primarily as (see the pics) it is marked on the side plate as “.357 Security Special”, which is notable as export models shipped to the S&W's distributor in Germany (Wischo) were so marked. My notes indicate that it shipped on 10-24-91. This gun came to me from another forum member, and from my recollection he acquired it in Europe and was able to bring it back to the US, my recollection was that he was a service member stationed over there. Maybe one day I’ll letter it, depending on how scarce these guns may turn out to be.
Looking for feedback and info if anyone has one of these CS-3 revolvers.
Most of my pics will show these two wearing factory magna grips (my assumption is that they would have shipped that way), but it would not be one of my pictorials unless I dressed them properly with Spegel boot grips, Gratuious pic added below

Also note that both of these are sporting a Patridge front sight, that’s how I like em, they originally had the standard ramp front sight used on modern Smith revolvers.









Would love to hear about your CS-3 models.....
Enjoy and thanks for looking.
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