Just received the CT laser grips for my 686 today. I was so pleased with the CTs that came on my recent purchase of a S&S 642CT that I just HAD TO add them to my 30yr old 686 too! What a great tool these laser grips are! They are great for training in DA shooting using snap caps before taking a trip to the range. The laser quickly shows any errors in your trigger pull, such as drift, jerking, etc. This is much easier to learn from than burning through many boxes of ammo. I would venture to say that the cost of these grips can easily pay for themselves in all the NON-wasted ammo that you save by practicing with the Laser and snap caps. I love them!