Post pics and you will get better response.
The unfluted cylinder adds about a tenth of an ounce is all. The 3-5-7 was a Talo exclusive and made in less common 3”, 5”, and 7” barrels.
I've had one for a very long time. I bought it for the barrel length and I liked the unfluted cylinder.
The stock grips were some of the worst designed things I have ever used. While they are very thin at the top, allowing for good reloads with a speed loader, they force a very low hold on the gun. I prefer to get up high, so those were swapped out for ahrends stocks and I never missed the originals.
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Overall I think the 3" 686 is the perfect sized L frame, it just feels right in my hands and I am glad that I own it.
The stock grips were some of the worst designed things I have ever used. While they are very thin at the top, allowing for good reloads with a speed loader, they force a very low hold on the gun. I prefer to get up high, so those were swapped out for ahrends stocks and I never missed the originals.
The 686+ 3-5-7 (3" & 5" & 7") was an exclusive Talo distributor item. The Smith & Wesson/Talo partnership ended at the end of 2016. S&W now offers the 686+ 3-5-7 as a standard S&W item. I had a 5" for a while, incredible balance because of the 5".