Post No. 4 just made me cringe. Horrible example of "Friday Afternoon" gunsmithing. Anything to get it out the door. It is too bad that the owner was not in position to just send the handgun back and demand a replacement. Yes, I feel that strongly about it.

To give my answer to the OP: IF I had all the replacement parts that I wanted to use on my workbench, it would take me about an hour to an hour and a half to complete that simple "Master Action Job". And that is taking my time making sure that I don't bugger any screw head or put scratches on the exterior of the handgun. And that would also include a cleaning and lube job. ..........