Does a new S&W 686 take moonclips?

Have not done an in depth study, but most of the Performance Center versions of 686 I've looked at are cut for moonclips. I don't recall any of the standard versions that are, but there are machine shop services that will make the modification.
 
I also wanted to get a moonclip cylinder for my 686+. I asked the factory if they could put one of the new cylinders used in the moonclipped 686+, was told I had to send the whole gun in. The cost was said to be around $300. I then asked if I could just buy one of the cylinders but was told no, they wouldn’t sell me the cylinder, but go to Brownells! I didn’t find one there.
Sounds a bit unreasonable as they have the cylinders pre cut sitting there, will happily install it for $300, but won’t sell it to me.
 
Midway has 686 cylinders for $120 - 6 shot versions. You could call them about the 7 shot version. There are a number of regular (e.g., 6 shot) used 686 cylinders for sale at Numrich's, eBay, etc. as I look now. The 7 shot cylinder appears to be a little harder to find. But new or used, probably around $120-$150 would be my guess.

TK Custom will charge $150 to machine a cylinder. I had them machine my Mdl 640 and they did a great job. Moonclips take a little for time to work with and appreciate, but there is no way to reload a cylinder faster than with a moonclip.

The $300 cost from S&W doesn't seem that far out of line... I've always been happy with the work I asked them to do (at my expense, in the past, like replacing a revolver barrel with a longer one) was always done very well, if not for the lowest price.
 
Just know before you go off spending big $ to get moon clip capability for your 38/357, that they can pretty finicky. Most if the issues are due to the case design with the rim but there are also issues with case diameter uniformity , longer cases having difficulty lining up with charging holes, clip thickness, etc. There ways to lessen those symptoms but clipped 357 revolvers are not at all forgiving like those taking clips for rimless cases like 45ACP and 9mm. There are threads here on the topic if you want to research.

FWIW, about 1/2 my 686 collection has moonclip capability but I rarely use them.
 
To better appreciate the 686+ with moonclips, the case and moonclips combo is the key. I load 38 shorts with starline brass and ranch products clips. Its trial and error.
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The standard 686 or the + model is not cut for moonclips. But the 686 pro and pc models are.

Those models not cut for moonclips can be. But you would have to send the cylinder out. Tk customs does that work.......

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And they do it well! Their moon clips keep their shape/tension forever too as long as you don't step on them in competition/accident with spent shells still attached in them!

Clark Customs is a good source as well...
 
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You have to use moonclips for rimless calibers. For rimmed calibers, with the cylinder cut for moons, you can use loose ammo, speedloaders, and moonclips interchangeably in one cylinder.
 
You have to use moonclips for rimless calibers. For rimmed calibers, with the cylinder cut for moons, you can use loose ammo, speedloaders, and moonclips interchangeably in one cylinder.

Good point. I assumed you meant the .38 or .357 since this is a 686 thread, but as P_D points out, it won't work without the clip on most revolvers for semi-auto ammo like the 986.
 
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