I just bought a MK9 series 03 elite. It was previously owned but never fired. I called Kahr and they said it was four yesrs old from the serial number.
This is the first all steal Kahr I have owned or even fired. It is truly superb, and a world of difference in the felt recoil. While I have fired 125 times so far, there has never been a been a problem with function. I would imagine that this is due to the all steel construction.
The TP45 price is kind of steep the way the market is for many other brands of 45's, that is my opinion. I have an XDS 45 which was selling for 499.