So a few weeks ago I sent my 681 in to SW for the M Modification , I called the PC center and asked them ...If they could put a snub nose barrel on it. The PC guys called me back and said that a 686 snub barrel would not work because of the front sight . But....he did have an extra PC681 barrel. I said "Do It"! Put it on. I had the gun taken apart , all springs gone over , cylinder chambers chamferrd and polished and a red ramp installed. I love this revolver. It's not a real PC681 but it is it's generic equivalent.

PC also put a trigger stop on.