I have been using Rugers forever in SASS and a few real Colts. I recently purchased a pair of Uberti 1873 SASS Pro .45's . These revolvers have a wide lower hammer, more open sight channels and reportedly special springs. They have a two position cylinder pin safety. They also have the a Hammer Safety Bar Safety? By the parts diagram and write up in the instruction manual a description of this gizmo, it appears that the hammer has a plunger pinned inside the hammer. This plunger actuates a spring loaded hammer safety bar that moves into place under the firing pin, when the hammer is put on 1/4 cock. This thing appears to be another lawyer driven item. Has anybody had any issues with this system? Thank you much for your comments. C-U, C.W.