I own this same revolver but have changed sights and grips over the years. What I found worked best for me was old school magna's with a Tyler-T grip adapter. It's the one pictured on my avatar.

Also I believe when they were first released these were a TALO edition revolver. They were suppose to be a limited edition but then became standard production. It was the only 686+ in a 3" offering that was part of two other Deluxe models in 5" and 7", as the factory offerings were in 2.5", 4" and 6". Now the only thing making it deluxe is the grip.

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Ephesians 6 (Armor of God)