If Your 686 No Dash doen't have the M stamped in the yolk area then it's still covered under the recall by S&W for an upgrade for a hammer nose bushing & fireing pin..
Just give them a call & they'll send you out a shipping label..
Then go to a Fedex & ship it out to them & wait for it to return to your home.. All parts, labor & S&H covered for FREE by Smith & Wesson..
Gary/Hk