Standard MFG SAA's have had quality control issues. The hands are not hardened (Colts are) and will cause timing issues with extended or hard use. Cylinders over-rotating due to poorly fit bolts. Hammers that bind in the frame because the hammers are too wide for the frame slot. Some have even been found with Italian (Uberti) hands in them no kidding. Qualified screws will make you nuts as they go more out of time every time you touch them. about 10% had mechanical issues. Stick with Colts and USFA.
