Ruger Single Actions.......
Well, alright, here's a good spot. Ruger Single Actions (except the Bearcat series) lend themselves well to work by the home gunsmith.
Most of my Blackhawks came with the alloy grip frames and ejector rod housings. These are easily changed out for steel items. I have bought steel grip frames for the Ruger Old Army from Brownel's and fit these to the older Three-Screw guns. Takes a little time with files and emery paper, plus using a good cold blue, such as Birchwood-Casey's Super Blue. Or, have it blued by a professional.
There's so many ways to customize these, please let us hear form your work!