Howard B. That is a .250 Post pin in sight ordered from Smith and Wesson. On the rear vertical edge of the sight I used a stone and some emery cloth and made a 10-15 degree ramp sloping upward. I don't snag leather with it when I draw. I then painted the rear face of the sight with Hot Orange Model paint and when you go to pick up the front sight all you see is a Orange picket in front of you, for a sight.
C.S, In some ways this is the best defensive revolver I have ever owned. Did have some trouble with light hammer strikes when I first got the gun. Replaced the standard firing pin with an extended one from C&S and still got light strikes. So I put in an old Mainspring I had laying about. About 50 rounds of 45 downrange and the firing pin broke.
So I replaced the broken C&S firing pin with the original and kept the old mainspring,and so far no problems.
In all fairness to Smith and Wesson, I shoot nothing but reloads and use CCI primers 90% of the time because they are usually available as I only live 20 miles from where they are manufactured.
Some of the problems have been attributed to primer depth coupled with hard primers (cci). I've not had any problems with factory ammo.
Fastest reload in a revolver, a slug that has great authority in any bullet configuration, and shooting 45 without chasing brass.
2" goups at 25yds is the norm. Would I buy another one? I have two.