Hello,
I just bought the PT-845. All parts are metal. First range trip was today, and the pistol really shot well. Very few stove pipes with my reloads, maybe 5 out of 300 rounds. It fed my hollowpoints, SWC, and roundball very well. I also have an M&P 45c, and bought this gun to compare. To be honest, I like the PT-845 equally as much if not slightly more than the M&P. I'm very happy with this gun, and looking forward to the next time at the range. There was a recent post about the front site being slightly off-center with this model. Mine was off to the left a few cm. I didn't try to center the front site until I shot the gun. I'm glad I didn't. This gun shot to point of aim even with the front site off slightly.
Hope that helps. Another Taurus success story.