My S&W 19. Started off as a 2 1/2 inch. But since I regretted selling of my 3" Lew Horton 66 round butt with full length ejector rod I had it modified about 15 years ago. It now sports a 3" HB off a model 13 with a small rib to accomodate a standard height front sight with a full length ejector rod.
I carry it in either a Bianchi pistol pocket with 125 JHPs or if in the field with the Lost River 170 Keiths in a WWII era Victory shoulder/chest holster.