breakage
I've been using Uberti Opentops as main match pistols for almost 5 years, no parts broken except hand springs, which I replaced with Ruger coil and plungers. I did make new firing pins from music wire stock as the originals were bending. The Smith Shop and VTI sell improved firing pins for the Opentop. Mainsprings are Wolff.
Before the Opentops I shot Uberti 1851's converted with R&D and Kirst gated. Springs are the only issue.
I occasionally shoot Uberti Schofields and Russians, no problems there either.